allows to apply modifiers on them.experimental
jmekaelthas
10 years ago
parent
6ec86fe919
commit
c90e50bb2e
@ -0,0 +1,890 @@ |
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package com.jme3.scene.plugins.blender.curves; |
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|
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import java.nio.FloatBuffer; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Map.Entry; |
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import java.util.TreeMap; |
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import java.util.logging.Logger; |
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|
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import com.jme3.material.RenderState.FaceCullMode; |
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import com.jme3.math.FastMath; |
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import com.jme3.math.Spline; |
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import com.jme3.math.Spline.SplineType; |
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import com.jme3.math.Vector3f; |
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import com.jme3.math.Vector4f; |
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import com.jme3.scene.VertexBuffer.Type; |
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import com.jme3.scene.mesh.IndexBuffer; |
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import com.jme3.scene.plugins.blender.BlenderContext; |
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import com.jme3.scene.plugins.blender.file.BlenderFileException; |
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import com.jme3.scene.plugins.blender.file.BlenderInputStream; |
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import com.jme3.scene.plugins.blender.file.DynamicArray; |
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import com.jme3.scene.plugins.blender.file.FileBlockHeader; |
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import com.jme3.scene.plugins.blender.file.Pointer; |
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import com.jme3.scene.plugins.blender.file.Structure; |
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import com.jme3.scene.plugins.blender.materials.MaterialContext; |
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import com.jme3.scene.plugins.blender.materials.MaterialHelper; |
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import com.jme3.scene.plugins.blender.meshes.Edge; |
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import com.jme3.scene.plugins.blender.meshes.Face; |
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import com.jme3.scene.plugins.blender.meshes.TemporalMesh; |
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import com.jme3.scene.shape.Curve; |
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import com.jme3.scene.shape.Surface; |
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import com.jme3.util.BufferUtils; |
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|
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/** |
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* A temporal mesh for curves and surfaces. It works in similar way as TemporalMesh for meshes. |
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* It prepares all neccessary lines and faces and allows to apply modifiers just like in regular temporal mesh. |
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* |
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* @author Marcin Roguski (Kaelthas) |
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*/ |
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public class CurvesTemporalMesh extends TemporalMesh { |
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private static final Logger LOGGER = Logger.getLogger(CurvesTemporalMesh.class.getName()); |
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private static final int TYPE_BEZIER = 0x0001; |
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private static final int TYPE_NURBS = 0x0004; |
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private static final int FLAG_3D = 0x0001; |
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private static final int FLAG_FRONT = 0x0002; |
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private static final int FLAG_BACK = 0x0004; |
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private static final int FLAG_FILL_CAPS = 0x4000; |
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private static final int FLAG_SMOOTH = 0x0001; |
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protected CurvesHelper curvesHelper; |
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protected boolean is2D; |
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protected boolean isFront; |
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protected boolean isBack; |
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protected boolean fillCaps; |
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protected float bevelStart; |
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protected float bevelEnd; |
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protected List<BezierLine> beziers = new ArrayList<BezierLine>(); |
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protected CurvesTemporalMesh bevelObject; |
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protected CurvesTemporalMesh taperObject; |
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/** The scale that is used if the curve is a bevel or taper curve. */ |
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protected Vector3f scale = new Vector3f(1, 1, 1); |
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|
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/** |
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* The constructor creates an empty temporal mesh. |
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* @param blenderContext |
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* the blender context |
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* @throws BlenderFileException |
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* this will never be thrown here |
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*/ |
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protected CurvesTemporalMesh(BlenderContext blenderContext) throws BlenderFileException { |
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super(null, blenderContext, false); |
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} |
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/** |
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* Loads the temporal mesh from the given curve structure. The mesh can be either curve or surface. |
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* @param curveStructure |
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* the structure that contains the curve/surface data |
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* @param blenderContext |
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* the blender context |
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* @throws BlenderFileException |
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* an exception is thrown when problems with reading occur |
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*/ |
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public CurvesTemporalMesh(Structure curveStructure, BlenderContext blenderContext) throws BlenderFileException { |
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this(curveStructure, new Vector3f(1, 1, 1), true, blenderContext); |
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} |
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/** |
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* Loads the temporal mesh from the given curve structure. The mesh can be either curve or surface. |
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* @param curveStructure |
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* the structure that contains the curve/surface data |
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* @param scale |
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* the scale used if the current curve is used as a bevel curve |
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* @param loadBevelAndTaper indicates if bevel and taper should be loaded (this is not needed for curves that are loaded to be used as bevel and taper) |
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* @param blenderContext |
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* the blender context |
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* @throws BlenderFileException |
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* an exception is thrown when problems with reading occur |
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*/ |
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@SuppressWarnings("unchecked") |
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private CurvesTemporalMesh(Structure curveStructure, Vector3f scale, boolean loadBevelAndTaper, BlenderContext blenderContext) throws BlenderFileException { |
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super(curveStructure, blenderContext, false); |
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name = curveStructure.getName(); |
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curvesHelper = blenderContext.getHelper(CurvesHelper.class); |
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this.scale = scale; |
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int flag = ((Number) curveStructure.getFieldValue("flag")).intValue(); |
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is2D = (flag & FLAG_3D) == 0; |
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if (is2D) { |
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// TODO: add support for 3D flag
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LOGGER.warning("2D flag not yet supported for curves!"); |
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} |
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isFront = (flag & FLAG_FRONT) != 0; |
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isBack = (flag & FLAG_BACK) != 0; |
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fillCaps = (flag & FLAG_FILL_CAPS) != 0; |
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bevelStart = ((Number) curveStructure.getFieldValue("bevfac1", 0)).floatValue(); |
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bevelEnd = ((Number) curveStructure.getFieldValue("bevfac2", 1)).floatValue(); |
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if (bevelStart > bevelEnd) { |
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float temp = bevelStart; |
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bevelStart = bevelEnd; |
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bevelEnd = temp; |
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} |
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LOGGER.fine("Reading nurbs (and sorting them by material)."); |
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Map<Number, List<Structure>> nurbs = new HashMap<Number, List<Structure>>(); |
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List<Structure> nurbStructures = ((Structure) curveStructure.getFieldValue("nurb")).evaluateListBase(); |
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for (Structure nurb : nurbStructures) { |
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Number matNumber = (Number) nurb.getFieldValue("mat_nr"); |
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List<Structure> nurbList = nurbs.get(matNumber); |
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if (nurbList == null) { |
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nurbList = new ArrayList<Structure>(); |
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nurbs.put(matNumber, nurbList); |
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} |
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nurbList.add(nurb); |
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} |
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LOGGER.fine("Getting materials."); |
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MaterialHelper materialHelper = blenderContext.getHelper(MaterialHelper.class); |
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materials = materialHelper.getMaterials(curveStructure, blenderContext); |
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if (materials != null) { |
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for (MaterialContext materialContext : materials) { |
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materialContext.setFaceCullMode(FaceCullMode.Off); |
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} |
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} |
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LOGGER.fine("Getting or creating bevel object."); |
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bevelObject = loadBevelAndTaper ? this.loadBevelObject(curveStructure) : null; |
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LOGGER.fine("Getting taper object."); |
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Pointer pTaperObject = (Pointer) curveStructure.getFieldValue("taperobj"); |
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if (bevelObject != null && pTaperObject.isNotNull()) { |
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Structure taperObjectStructure = pTaperObject.fetchData().get(0); |
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DynamicArray<Number> scaleArray = (DynamicArray<Number>) taperObjectStructure.getFieldValue("size"); |
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scale = blenderContext.getBlenderKey().isFixUpAxis() ? new Vector3f(scaleArray.get(0).floatValue(), scaleArray.get(1).floatValue(), scaleArray.get(2).floatValue()) : new Vector3f(scaleArray.get(0).floatValue(), scaleArray.get(2).floatValue(), scaleArray.get(1).floatValue()); |
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Pointer pTaperStructure = (Pointer) taperObjectStructure.getFieldValue("data"); |
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Structure taperStructure = pTaperStructure.fetchData().get(0); |
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taperObject = new CurvesTemporalMesh(taperStructure, blenderContext); |
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} |
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LOGGER.fine("Creating the result curves."); |
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for (Entry<Number, List<Structure>> nurbEntry : nurbs.entrySet()) { |
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for (Structure nurb : nurbEntry.getValue()) { |
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int type = ((Number) nurb.getFieldValue("type")).intValue(); |
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if ((type & TYPE_BEZIER) != 0) { |
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this.loadBezierCurve(nurb, nurbEntry.getKey().intValue()); |
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} else if ((type & TYPE_NURBS) != 0) { |
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this.loadNurbSurface(nurb, nurbEntry.getKey().intValue()); |
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} else { |
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throw new BlenderFileException("Unknown curve type: " + type); |
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} |
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} |
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} |
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if (bevelObject != null && beziers.size() > 0) { |
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this.append(this.applyBevelAndTaper(this, bevelObject, taperObject, blenderContext)); |
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} else { |
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int originalVerticesAmount = vertices.size(); |
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for (BezierLine bezierLine : beziers) { |
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vertices.add(bezierLine.vertices[0]); |
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Vector3f v = bezierLine.vertices[1].subtract(bezierLine.vertices[0]).normalizeLocal(); |
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float temp = v.x; |
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v.x = -v.y; |
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v.y = temp; |
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v.z = 0; |
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normals.add(v);// this will be smoothed in the next iteration
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for (int i = 1; i < bezierLine.vertices.length; ++i) { |
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vertices.add(bezierLine.vertices[i]); |
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edges.add(new Edge(originalVerticesAmount + i - 1, originalVerticesAmount + i, 0, false, this)); |
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// generating normal for vertex at 'i'
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v = bezierLine.vertices[i].subtract(bezierLine.vertices[i - 1]).normalizeLocal(); |
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temp = v.x; |
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v.x = -v.y; |
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v.y = temp; |
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v.z = 0; |
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// make the previous normal smooth
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normals.get(i - 1).addLocal(v).multLocal(0.5f).normalizeLocal(); |
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normals.add(v);// this will be smoothed in the next iteration
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} |
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} |
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} |
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} |
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/** |
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* The method computes the value of a point at the certain relational distance from its beggining. |
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* @param alongRatio |
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* the relative distance along the curve; should be a value between 0 and 1 inclusive; |
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* if the value exceeds the boundaries it is truncated to them |
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* @return computed value along the curve |
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*/ |
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private Vector3f getValueAlongCurve(float alongRatio) { |
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alongRatio = FastMath.clamp(alongRatio, 0, 1); |
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Vector3f result = new Vector3f(); |
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float probeLength = this.getLength() * alongRatio, length = 0; |
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for (BezierLine bezier : beziers) { |
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float edgeLength = bezier.getLength(); |
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if (length + edgeLength >= probeLength) { |
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float ratioAlongEdge = (probeLength - length) / edgeLength; |
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return bezier.getValueAlongCurve(ratioAlongEdge); |
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} |
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length += edgeLength; |
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} |
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return result; |
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} |
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/** |
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* @return the length of the curve |
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*/ |
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private float getLength() { |
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float result = 0; |
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for (BezierLine bezier : beziers) { |
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result += bezier.getLength(); |
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} |
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return result; |
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} |
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/** |
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* The methods loads the bezier curve from the given structure. |
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* @param nurbStructure |
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* the structure containing a single curve definition |
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* @param materialIndex |
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* the index of this segment's material |
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* @throws BlenderFileException |
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* an exception is thrown when problems with reading occur |
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*/ |
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private void loadBezierCurve(Structure nurbStructure, int materialIndex) throws BlenderFileException { |
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Pointer pBezierTriple = (Pointer) nurbStructure.getFieldValue("bezt"); |
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if (pBezierTriple.isNotNull()) { |
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int resolution = ((Number) nurbStructure.getFieldValue("resolu")).intValue(); |
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boolean cyclic = (((Number) nurbStructure.getFieldValue("flagu")).intValue() & 0x01) != 0; |
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boolean smooth = (((Number) nurbStructure.getFieldValue("flag")).intValue() & FLAG_SMOOTH) != 0; |
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// creating the curve object
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BezierCurve bezierCurve = new BezierCurve(0, pBezierTriple.fetchData(), 3, blenderContext.getBlenderKey().isFixUpAxis()); |
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List<Vector3f> controlPoints = bezierCurve.getControlPoints(); |
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if (cyclic) { |
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// copy the first three points at the end
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for (int i = 0; i < 3; ++i) { |
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controlPoints.add(controlPoints.get(i)); |
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} |
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} |
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// removing the first and last handles
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controlPoints.remove(0); |
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controlPoints.remove(controlPoints.size() - 1); |
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// creating curve
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Curve curve = new Curve(new Spline(SplineType.Bezier, controlPoints, 0, false), resolution); |
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FloatBuffer vertsBuffer = (FloatBuffer) curve.getBuffer(Type.Position).getData(); |
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beziers.add(new BezierLine(BufferUtils.getVector3Array(vertsBuffer), materialIndex, smooth, cyclic)); |
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} |
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} |
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/** |
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* This method loads the NURBS curve or surface. |
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* @param nurb |
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* the NURBS data structure |
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* @throws BlenderFileException |
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* an exception is thrown when problems with reading occur |
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*/ |
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@SuppressWarnings("unchecked") |
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private void loadNurbSurface(Structure nurb, int materialIndex) throws BlenderFileException { |
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// loading the knots
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List<Float>[] knots = new List[2]; |
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Pointer[] pKnots = new Pointer[] { (Pointer) nurb.getFieldValue("knotsu"), (Pointer) nurb.getFieldValue("knotsv") }; |
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for (int i = 0; i < knots.length; ++i) { |
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if (pKnots[i].isNotNull()) { |
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FileBlockHeader fileBlockHeader = blenderContext.getFileBlock(pKnots[i].getOldMemoryAddress()); |
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BlenderInputStream blenderInputStream = blenderContext.getInputStream(); |
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blenderInputStream.setPosition(fileBlockHeader.getBlockPosition()); |
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int knotsAmount = fileBlockHeader.getCount() * fileBlockHeader.getSize() / 4; |
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knots[i] = new ArrayList<Float>(knotsAmount); |
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for (int j = 0; j < knotsAmount; ++j) { |
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knots[i].add(Float.valueOf(blenderInputStream.readFloat())); |
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} |
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} |
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} |
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// loading the flags and orders (basis functions degrees)
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int flag = ((Number) nurb.getFieldValue("flag")).intValue(); |
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boolean smooth = (flag & FLAG_SMOOTH) != 0; |
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int flagU = ((Number) nurb.getFieldValue("flagu")).intValue(); |
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int flagV = ((Number) nurb.getFieldValue("flagv")).intValue(); |
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int orderU = ((Number) nurb.getFieldValue("orderu")).intValue(); |
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int orderV = ((Number) nurb.getFieldValue("orderv")).intValue(); |
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// loading control points and their weights
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int pntsU = ((Number) nurb.getFieldValue("pntsu")).intValue(); |
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int pntsV = ((Number) nurb.getFieldValue("pntsv")).intValue(); |
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List<Structure> bPoints = ((Pointer) nurb.getFieldValue("bp")).fetchData(); |
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List<List<Vector4f>> controlPoints = new ArrayList<List<Vector4f>>(pntsV); |
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for (int i = 0; i < pntsV; ++i) { |
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List<Vector4f> uControlPoints = new ArrayList<Vector4f>(pntsU); |
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for (int j = 0; j < pntsU; ++j) { |
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DynamicArray<Float> vec = (DynamicArray<Float>) bPoints.get(j + i * pntsU).getFieldValue("vec"); |
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if (blenderContext.getBlenderKey().isFixUpAxis()) { |
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uControlPoints.add(new Vector4f(vec.get(0).floatValue(), vec.get(2).floatValue(), -vec.get(1).floatValue(), vec.get(3).floatValue())); |
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} else { |
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uControlPoints.add(new Vector4f(vec.get(0).floatValue(), vec.get(1).floatValue(), vec.get(2).floatValue(), vec.get(3).floatValue())); |
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} |
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} |
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if ((flagU & 0x01) != 0) { |
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for (int k = 0; k < orderU - 1; ++k) { |
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uControlPoints.add(uControlPoints.get(k)); |
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} |
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} |
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controlPoints.add(uControlPoints); |
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} |
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if ((flagV & 0x01) != 0) { |
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for (int k = 0; k < orderV - 1; ++k) { |
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controlPoints.add(controlPoints.get(k)); |
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} |
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} |
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int originalVerticesAmount = vertices.size(); |
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int resolu = ((Number) nurb.getFieldValue("resolu")).intValue(); |
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if (knots[1] == null) {// creating the NURB curve
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Curve curve = new Curve(new Spline(controlPoints.get(0), knots[0]), resolu); |
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FloatBuffer vertsBuffer = (FloatBuffer) curve.getBuffer(Type.Position).getData(); |
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beziers.add(new BezierLine(BufferUtils.getVector3Array(vertsBuffer), materialIndex, smooth, false)); |
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} else {// creating the NURB surface
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int resolv = ((Number) nurb.getFieldValue("resolv")).intValue(); |
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int uSegments = resolu * controlPoints.get(0).size() - 1; |
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int vSegments = resolv * controlPoints.size() - 1; |
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Surface nurbSurface = Surface.createNurbsSurface(controlPoints, knots, uSegments, vSegments, orderU, orderV, smooth); |
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FloatBuffer vertsBuffer = (FloatBuffer) nurbSurface.getBuffer(Type.Position).getData(); |
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vertices.addAll(Arrays.asList(BufferUtils.getVector3Array(vertsBuffer))); |
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FloatBuffer normalsBuffer = (FloatBuffer) nurbSurface.getBuffer(Type.Normal).getData(); |
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normals.addAll(Arrays.asList(BufferUtils.getVector3Array(normalsBuffer))); |
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IndexBuffer indexBuffer = nurbSurface.getIndexBuffer(); |
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for (int i = 0; i < indexBuffer.size(); i += 3) { |
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int index1 = indexBuffer.get(i) + originalVerticesAmount; |
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int index2 = indexBuffer.get(i + 1) + originalVerticesAmount; |
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int index3 = indexBuffer.get(i + 2) + originalVerticesAmount; |
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faces.add(new Face(new Integer[] { index1, index2, index3 }, smooth, materialIndex, null, null, this)); |
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} |
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} |
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} |
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/** |
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* The method loads the bevel object that sould be applied to curve. It can either be another curve or a generated one |
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* based on the bevel generating parameters in blender. |
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* @param curveStructure |
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* the structure with the curve's data (the curve being loaded, NOT the bevel curve) |
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* @return the curve's bevel object |
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* @throws BlenderFileException |
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* an exception is thrown when problems with reading occur |
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*/ |
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@SuppressWarnings("unchecked") |
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private CurvesTemporalMesh loadBevelObject(Structure curveStructure) throws BlenderFileException { |
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CurvesTemporalMesh bevelObject = null; |
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Pointer pBevelObject = (Pointer) curveStructure.getFieldValue("bevobj"); |
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boolean cyclic = false; |
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if (pBevelObject.isNotNull()) { |
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Structure bevelObjectStructure = pBevelObject.fetchData().get(0); |
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DynamicArray<Number> scaleArray = (DynamicArray<Number>) bevelObjectStructure.getFieldValue("size"); |
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Vector3f scale = blenderContext.getBlenderKey().isFixUpAxis() ? new Vector3f(scaleArray.get(0).floatValue(), scaleArray.get(1).floatValue(), scaleArray.get(2).floatValue()) : new Vector3f(scaleArray.get(0).floatValue(), scaleArray.get(2).floatValue(), scaleArray.get(1).floatValue()); |
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Pointer pBevelStructure = (Pointer) bevelObjectStructure.getFieldValue("data"); |
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Structure bevelStructure = pBevelStructure.fetchData().get(0); |
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bevelObject = new CurvesTemporalMesh(bevelStructure, scale, false, blenderContext); |
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// transforming the bezier lines from plane XZ to plane YZ
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for (BezierLine bl : bevelObject.beziers) { |
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for (Vector3f v : bl.vertices) { |
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// casting the bezier curve orthogonally on the plane XZ (making Y = 0) and then moving the plane XZ to ZY in a way that:
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// -Z => +Y and +X => +Z and +Y => +X (but because casting would make Y = 0, then we simply set X = 0)
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v.y = -v.z; |
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v.z = v.x; |
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v.x = 0; |
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} |
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// bevel curves should not have repeated the first vertex at the end when they are cyclic (this is handled differently)
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if (bl.isCyclic()) { |
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bl.removeLastVertex(); |
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} |
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} |
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} else { |
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fillCaps = false;// this option is inactive in blender when there is no bevel object applied
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int bevResol = ((Number) curveStructure.getFieldValue("bevresol")).intValue(); |
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float extrude = ((Number) curveStructure.getFieldValue("ext1")).floatValue(); |
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float bevelDepth = ((Number) curveStructure.getFieldValue("ext2")).floatValue(); |
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float offset = ((Number) curveStructure.getFieldValue("offset", 0)).floatValue(); |
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if (offset != 0) { |
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// TODO: add support for offset parameter
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LOGGER.warning("Offset parameter not yet supported."); |
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} |
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Curve bevelCurve = null; |
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if (bevelDepth > 0.0f) { |
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float handlerLength = bevelDepth / 2.0f; |
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cyclic = !isFront && !isBack; |
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List<Vector3f> conrtolPoints = new ArrayList<Vector3f>(); |
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// blenders from 2.49 to 2.52 did not pay attention to fron and back faces
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// so in order to draw the scene exactly as it is in different blender versions the blender version is checked here
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// when neither fron and back face is selected all version behave the same and draw full bevel around the curve
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if (cyclic || blenderContext.getBlenderVersion() < 253) { |
||||
conrtolPoints.add(new Vector3f(0, -extrude - bevelDepth, 0)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude - bevelDepth, -handlerLength)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, -extrude - handlerLength, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude + handlerLength, -bevelDepth)); |
||||
|
||||
if (extrude > 0) { |
||||
conrtolPoints.add(new Vector3f(0, extrude - handlerLength, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, extrude, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, extrude + handlerLength, -bevelDepth)); |
||||
} |
||||
|
||||
conrtolPoints.add(new Vector3f(0, extrude + bevelDepth, -handlerLength)); |
||||
conrtolPoints.add(new Vector3f(0, extrude + bevelDepth, 0)); |
||||
|
||||
if (cyclic) { |
||||
conrtolPoints.add(new Vector3f(0, extrude + bevelDepth, handlerLength)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, extrude + handlerLength, bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, extrude, bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, extrude - handlerLength, bevelDepth)); |
||||
|
||||
if (extrude > 0) { |
||||
conrtolPoints.add(new Vector3f(0, -extrude + handlerLength, bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude, bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude - handlerLength, bevelDepth)); |
||||
} |
||||
|
||||
conrtolPoints.add(new Vector3f(0, -extrude - bevelDepth, handlerLength)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude - bevelDepth, 0)); |
||||
} |
||||
} else { |
||||
if (extrude > 0) { |
||||
if (isBack) { |
||||
conrtolPoints.add(new Vector3f(0, -extrude - bevelDepth, 0)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude - bevelDepth, -handlerLength)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, -extrude - handlerLength, -bevelDepth)); |
||||
} |
||||
|
||||
conrtolPoints.add(new Vector3f(0, -extrude, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, -extrude + handlerLength, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, extrude - handlerLength, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, extrude, -bevelDepth)); |
||||
|
||||
if (isFront) { |
||||
conrtolPoints.add(new Vector3f(0, extrude + handlerLength, -bevelDepth)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, extrude + bevelDepth, -handlerLength)); |
||||
conrtolPoints.add(new Vector3f(0, extrude + bevelDepth, 0)); |
||||
} |
||||
} else { |
||||
if (isFront && isBack) { |
||||
conrtolPoints.add(new Vector3f(0, -bevelDepth, 0)); |
||||
conrtolPoints.add(new Vector3f(0, -bevelDepth, -handlerLength)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, -handlerLength, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, 0, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, handlerLength, -bevelDepth)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, bevelDepth, -handlerLength)); |
||||
conrtolPoints.add(new Vector3f(0, bevelDepth, 0)); |
||||
} else { |
||||
if (isBack) { |
||||
conrtolPoints.add(new Vector3f(0, -bevelDepth, 0)); |
||||
conrtolPoints.add(new Vector3f(0, -bevelDepth, -handlerLength)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, -handlerLength, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, 0, -bevelDepth)); |
||||
} else { |
||||
conrtolPoints.add(new Vector3f(0, 0, -bevelDepth)); |
||||
conrtolPoints.add(new Vector3f(0, handlerLength, -bevelDepth)); |
||||
|
||||
conrtolPoints.add(new Vector3f(0, bevelDepth, -handlerLength)); |
||||
conrtolPoints.add(new Vector3f(0, bevelDepth, 0)); |
||||
} |
||||
} |
||||
} |
||||
} |
||||
|
||||
bevelCurve = new Curve(new Spline(SplineType.Bezier, conrtolPoints, 0, false), bevResol); |
||||
} else if (extrude > 0.0f) { |
||||
Spline bevelSpline = new Spline(SplineType.Linear, new Vector3f[] { new Vector3f(0, extrude, 0), new Vector3f(0, -extrude, 0) }, 1, false); |
||||
bevelCurve = new Curve(bevelSpline, bevResol); |
||||
} |
||||
if (bevelCurve != null) { |
||||
bevelObject = new CurvesTemporalMesh(blenderContext); |
||||
FloatBuffer vertsBuffer = (FloatBuffer) bevelCurve.getBuffer(Type.Position).getData(); |
||||
Vector3f[] verts = BufferUtils.getVector3Array(vertsBuffer); |
||||
if (cyclic) {// get rid of the last vertex which is identical to the first one
|
||||
verts = Arrays.copyOf(verts, verts.length - 1); |
||||
} |
||||
bevelObject.beziers.add(new BezierLine(verts, 0, false, cyclic)); |
||||
} |
||||
} |
||||
return bevelObject; |
||||
} |
||||
|
||||
private List<BezierLine> getScaledBeziers() { |
||||
if (scale.equals(Vector3f.UNIT_XYZ)) { |
||||
return beziers; |
||||
} |
||||
List<BezierLine> result = new ArrayList<BezierLine>(); |
||||
for (BezierLine bezierLine : beziers) { |
||||
result.add(bezierLine.scale(scale)); |
||||
} |
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* This method applies bevel and taper objects to the curve. |
||||
* @param curve |
||||
* the curve we apply the objects to |
||||
* @param bevelObject |
||||
* the bevel object |
||||
* @param taperObject |
||||
* the taper object |
||||
* @param blenderContext |
||||
* the blender context |
||||
* @return a list of geometries representing the beveled and/or tapered curve |
||||
* @throws BlenderFileException |
||||
* an exception is thrown when problems with reading occur |
||||
*/ |
||||
private CurvesTemporalMesh applyBevelAndTaper(CurvesTemporalMesh curve, CurvesTemporalMesh bevelObject, CurvesTemporalMesh taperObject, BlenderContext blenderContext) throws BlenderFileException { |
||||
List<BezierLine> bevelBezierLines = bevelObject.getScaledBeziers(); |
||||
List<BezierLine> curveLines = curve.beziers; |
||||
if (bevelBezierLines.size() == 0 || curveLines.size() == 0) { |
||||
return null; |
||||
} |
||||
|
||||
CurvesTemporalMesh result = new CurvesTemporalMesh(blenderContext); |
||||
for (BezierLine curveLine : curveLines) { |
||||
Vector3f[] curveLineVertices = curveLine.getVertices(bevelStart, bevelEnd); |
||||
|
||||
for (BezierLine bevelBezierLine : bevelBezierLines) { |
||||
CurvesTemporalMesh partResult = new CurvesTemporalMesh(blenderContext); |
||||
|
||||
Vector3f[] bevelLineVertices = bevelBezierLine.getVertices(); |
||||
List<Vector3f[]> bevels = new ArrayList<Vector3f[]>(); |
||||
|
||||
Vector3f[] bevelPoints = curvesHelper.transformToFirstLineOfBevelPoints(bevelLineVertices, curveLineVertices[0], curveLineVertices[1]); |
||||
bevels.add(bevelPoints); |
||||
for (int i = 1; i < curveLineVertices.length - 1; ++i) { |
||||
bevelPoints = curvesHelper.transformBevel(bevelPoints, curveLineVertices[i - 1], curveLineVertices[i], curveLineVertices[i + 1]); |
||||
bevels.add(bevelPoints); |
||||
} |
||||
bevelPoints = curvesHelper.transformBevel(bevelPoints, curveLineVertices[curveLineVertices.length - 2], curveLineVertices[curveLineVertices.length - 1], null); |
||||
bevels.add(bevelPoints); |
||||
|
||||
Vector3f subtractResult = new Vector3f(); |
||||
if (bevels.size() > 2) { |
||||
// changing the first and last bevel so that they are parallel to their neighbours (blender works this way)
|
||||
// notice this implicates that the distances of every corresponding point in the two bevels must be identical and
|
||||
// equal to the distance between the points on curve that define the bevel position
|
||||
// so instead doing complicated rotations on each point we will simply properly translate each of them
|
||||
int[][] pointIndexes = new int[][] { { 0, 1 }, { curveLineVertices.length - 1, curveLineVertices.length - 2 } }; |
||||
for (int[] indexes : pointIndexes) { |
||||
float distance = curveLineVertices[indexes[1]].subtract(curveLineVertices[indexes[0]], subtractResult).length(); |
||||
Vector3f[] bevel = bevels.get(indexes[0]); |
||||
Vector3f[] nextBevel = bevels.get(indexes[1]); |
||||
for (int i = 0; i < bevel.length; ++i) { |
||||
float d = bevel[i].subtract(nextBevel[i], subtractResult).length(); |
||||
subtractResult.normalizeLocal().multLocal(distance - d); |
||||
bevel[i].addLocal(subtractResult); |
||||
} |
||||
} |
||||
} |
||||
|
||||
if (taperObject != null) { |
||||
float curveLength = curveLine.getLength(), lengthAlongCurve = bevelStart; |
||||
for (int i = 0; i < curveLineVertices.length; ++i) { |
||||
if (i > 0) { |
||||
lengthAlongCurve += curveLineVertices[i].subtract(curveLineVertices[i - 1], subtractResult).length(); |
||||
} |
||||
float taperScale = -taperObject.getValueAlongCurve(lengthAlongCurve / curveLength).z * taperObject.scale.z; |
||||
if (taperScale != 1) { |
||||
this.applyScale(bevels.get(i), curveLineVertices[i], taperScale); |
||||
} |
||||
} |
||||
} |
||||
|
||||
// adding vertices to the part result
|
||||
for (Vector3f[] bevel : bevels) { |
||||
for (Vector3f d : bevel) { |
||||
partResult.getVertices().add(d); |
||||
} |
||||
} |
||||
|
||||
// preparing faces for the part result (each face is a quad)
|
||||
int bevelVertCount = bevelPoints.length; |
||||
for (int i = 0; i < bevels.size() - 1; ++i) { |
||||
for (int j = 0; j < bevelVertCount - 1; ++j) { |
||||
Integer[] indexes = new Integer[] { i * bevelVertCount + j + 1, (i + 1) * bevelVertCount + j + 1, (i + 1) * bevelVertCount + j, i * bevelVertCount + j }; |
||||
partResult.getFaces().add(new Face(indexes, curveLine.isSmooth(), curveLine.getMaterialNumber(), null, null, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[0], indexes[1], 0, true, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[1], indexes[2], 0, true, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[2], indexes[3], 0, true, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[3], indexes[0], 0, true, partResult)); |
||||
} |
||||
if (bevelBezierLine.isCyclic()) { |
||||
int j = bevelVertCount - 1; |
||||
Integer[] indexes = new Integer[] { i * bevelVertCount, (i + 1) * bevelVertCount, (i + 1) * bevelVertCount + j, i * bevelVertCount + j }; |
||||
partResult.getFaces().add(new Face(indexes, curveLine.isSmooth(), curveLine.getMaterialNumber(), null, null, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[0], indexes[1], 0, true, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[1], indexes[2], 0, true, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[2], indexes[3], 0, true, partResult)); |
||||
partResult.getEdges().add(new Edge(indexes[3], indexes[0], 0, true, partResult)); |
||||
} |
||||
} |
||||
|
||||
partResult.generateNormals(); |
||||
|
||||
if (fillCaps) {// caps in blender behave as if they weren't affected by the smooth factor
|
||||
// START CAP
|
||||
Vector3f[] cap = bevels.get(0); |
||||
List<Integer> capIndexes = new ArrayList<Integer>(cap.length); |
||||
Vector3f capNormal = curveLineVertices[0].subtract(curveLineVertices[1]).normalizeLocal(); |
||||
for (int i = 0; i < cap.length; ++i) { |
||||
capIndexes.add(partResult.getVertices().size()); |
||||
partResult.getVertices().add(cap[i]); |
||||
partResult.getNormals().add(capNormal); |
||||
} |
||||
Collections.reverse(capIndexes);// the indexes ned to be reversed for the face to have fron face outside the beveled line
|
||||
partResult.getFaces().add(new Face(capIndexes.toArray(new Integer[capIndexes.size()]), false, curveLine.getMaterialNumber(), null, null, partResult)); |
||||
for (int i = 1; i < capIndexes.size(); ++i) { |
||||
partResult.getEdges().add(new Edge(capIndexes.get(i - 1), capIndexes.get(i), 0, true, partResult)); |
||||
} |
||||
|
||||
// END CAP
|
||||
cap = bevels.get(bevels.size() - 1); |
||||
capIndexes.clear(); |
||||
capNormal = curveLineVertices[curveLineVertices.length - 1].subtract(curveLineVertices[curveLineVertices.length - 2]).normalizeLocal(); |
||||
for (int i = 0; i < cap.length; ++i) { |
||||
capIndexes.add(partResult.getVertices().size()); |
||||
partResult.getVertices().add(cap[i]); |
||||
partResult.getNormals().add(capNormal); |
||||
} |
||||
partResult.getFaces().add(new Face(capIndexes.toArray(new Integer[capIndexes.size()]), false, curveLine.getMaterialNumber(), null, null, partResult)); |
||||
for (int i = 1; i < capIndexes.size(); ++i) { |
||||
partResult.getEdges().add(new Edge(capIndexes.get(i - 1), capIndexes.get(i), 0, true, partResult)); |
||||
} |
||||
} |
||||
|
||||
result.append(partResult); |
||||
} |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* The method generates normals for the curve. If any normals were already stored they are discarded. |
||||
*/ |
||||
private void generateNormals() { |
||||
Map<Integer, Vector3f> normalMap = new TreeMap<Integer, Vector3f>(); |
||||
for (Face face : faces) { |
||||
// the first 3 verts are enough here (all faces are triangles except for the caps, but those are fully flat anyway)
|
||||
int index1 = face.getIndexes().get(0); |
||||
int index2 = face.getIndexes().get(1); |
||||
int index3 = face.getIndexes().get(2); |
||||
|
||||
Vector3f n = FastMath.computeNormal(vertices.get(index1), vertices.get(index2), vertices.get(index3)); |
||||
for (int index : face.getIndexes()) { |
||||
Vector3f normal = normalMap.get(index); |
||||
if (normal == null) { |
||||
normalMap.put(index, n.clone()); |
||||
} else { |
||||
normal.addLocal(n).normalizeLocal(); |
||||
} |
||||
} |
||||
} |
||||
|
||||
normals.clear(); |
||||
Collections.addAll(normals, new Vector3f[normalMap.size()]); |
||||
for (Entry<Integer, Vector3f> entry : normalMap.entrySet()) { |
||||
normals.set(entry.getKey(), entry.getValue()); |
||||
} |
||||
} |
||||
|
||||
/** |
||||
* the method applies scale for the given bevel points. The points table is |
||||
* being modified so expect ypur result there. |
||||
* |
||||
* @param points |
||||
* the bevel points |
||||
* @param centerPoint |
||||
* the center point of the bevel |
||||
* @param scale |
||||
* the scale to be applied |
||||
*/ |
||||
private void applyScale(Vector3f[] points, Vector3f centerPoint, float scale) { |
||||
Vector3f taperScaleVector = new Vector3f(); |
||||
for (Vector3f p : points) { |
||||
taperScaleVector.set(centerPoint).subtractLocal(p).multLocal(1 - scale); |
||||
p.addLocal(taperScaleVector); |
||||
} |
||||
} |
||||
|
||||
/** |
||||
* A helper class that represents a single bezier line. It consists of Edge's and allows to |
||||
* get a subline of a lentgh of the line. |
||||
* |
||||
* @author Marcin Roguski (Kaelthas) |
||||
*/ |
||||
public static class BezierLine { |
||||
/** The edges of the bezier line. */ |
||||
private Vector3f[] vertices; |
||||
/** The material number of the line. */ |
||||
private int materialNumber; |
||||
/** Indicates if the line is smooth of flat. */ |
||||
private boolean smooth; |
||||
/** The length of the line. */ |
||||
private float length; |
||||
/** Indicates if the current line is cyclic or not. */ |
||||
private boolean cyclic; |
||||
|
||||
public BezierLine(Vector3f[] vertices, int materialNumber, boolean smooth, boolean cyclik) { |
||||
this.vertices = vertices; |
||||
this.materialNumber = materialNumber; |
||||
this.smooth = smooth; |
||||
cyclic = cyclik; |
||||
this.recomputeLength(); |
||||
} |
||||
|
||||
public BezierLine scale(Vector3f scale) { |
||||
BezierLine result = new BezierLine(vertices, materialNumber, smooth, cyclic); |
||||
result.vertices = new Vector3f[vertices.length]; |
||||
for (int i = 0; i < vertices.length; ++i) { |
||||
result.vertices[i] = vertices[i].mult(scale); |
||||
} |
||||
result.recomputeLength(); |
||||
return result; |
||||
} |
||||
|
||||
public void removeLastVertex() { |
||||
Vector3f[] newVertices = new Vector3f[vertices.length - 1]; |
||||
for (int i = 0; i < vertices.length - 1; ++i) { |
||||
newVertices[i] = vertices[i]; |
||||
} |
||||
vertices = newVertices; |
||||
this.recomputeLength(); |
||||
} |
||||
|
||||
private void recomputeLength() { |
||||
length = 0; |
||||
for (int i = 1; i < vertices.length; ++i) { |
||||
length += vertices[i - 1].distance(vertices[i]); |
||||
} |
||||
if (cyclic) { |
||||
// if the first vertex is repeated at the end the distance will be = 0 so it won't affect the result, and if it is not repeated
|
||||
// then it is neccessary to add the length between the last and the first vertex
|
||||
length += vertices[vertices.length - 1].distance(vertices[0]); |
||||
} |
||||
} |
||||
|
||||
public Vector3f[] getVertices() { |
||||
return this.getVertices(0, 1); |
||||
} |
||||
|
||||
public Vector3f[] getVertices(float startSlice, float endSlice) { |
||||
if (startSlice == 0 && endSlice == 1) { |
||||
return vertices; |
||||
} |
||||
List<Vector3f> result = new ArrayList<Vector3f>(); |
||||
float length = this.getLength(), temp = 0; |
||||
float startSliceLength = length * startSlice; |
||||
float endSliceLength = length * endSlice; |
||||
int index = 1; |
||||
|
||||
if (startSlice > 0) { |
||||
while (temp < startSliceLength) { |
||||
Vector3f v1 = vertices[index - 1]; |
||||
Vector3f v2 = vertices[index++]; |
||||
float edgeLength = v1.distance(v2); |
||||
temp += edgeLength; |
||||
if (temp == startSliceLength) { |
||||
result.add(v2); |
||||
} else if (temp > startSliceLength) { |
||||
result.add(v1.subtract(v2).normalizeLocal().multLocal(temp - startSliceLength).addLocal(v2)); |
||||
} |
||||
} |
||||
} |
||||
|
||||
if (endSlice < 1) { |
||||
if (index == vertices.length) { |
||||
Vector3f v1 = vertices[vertices.length - 2]; |
||||
Vector3f v2 = vertices[vertices.length - 1]; |
||||
result.add(v1.subtract(v2).normalizeLocal().multLocal(length - endSliceLength).addLocal(v2)); |
||||
} else { |
||||
for (int i = index; i < vertices.length && temp < endSliceLength; ++i) { |
||||
Vector3f v1 = vertices[index - 1]; |
||||
Vector3f v2 = vertices[index++]; |
||||
temp += v1.distance(v2); |
||||
if (temp == endSliceLength) { |
||||
result.add(v2); |
||||
} else if (temp > endSliceLength) { |
||||
result.add(v1.subtract(v2).normalizeLocal().multLocal(temp - startSliceLength).addLocal(v2)); |
||||
} |
||||
} |
||||
} |
||||
} else { |
||||
result.addAll(Arrays.asList(Arrays.copyOfRange(vertices, index, vertices.length))); |
||||
} |
||||
|
||||
return result.toArray(new Vector3f[result.size()]); |
||||
} |
||||
|
||||
/** |
||||
* The method computes the value of a point at the certain relational distance from its beggining. |
||||
* @param alongRatio |
||||
* the relative distance along the curve; should be a value between 0 and 1 inclusive; |
||||
* if the value exceeds the boundaries it is truncated to them |
||||
* @return computed value along the curve |
||||
*/ |
||||
public Vector3f getValueAlongCurve(float alongRatio) { |
||||
alongRatio = FastMath.clamp(alongRatio, 0, 1); |
||||
Vector3f result = new Vector3f(); |
||||
float probeLength = this.getLength() * alongRatio; |
||||
float length = 0; |
||||
for (int i = 1; i < vertices.length; ++i) { |
||||
float edgeLength = vertices[i].distance(vertices[i - 1]); |
||||
if (length + edgeLength > probeLength) { |
||||
float ratioAlongEdge = (probeLength - length) / edgeLength; |
||||
return FastMath.interpolateLinear(ratioAlongEdge, vertices[i - 1], vertices[i]); |
||||
} else if (length + edgeLength == probeLength) { |
||||
return vertices[i]; |
||||
} |
||||
length += edgeLength; |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* @return the material number of this bezier line |
||||
*/ |
||||
public int getMaterialNumber() { |
||||
return materialNumber; |
||||
} |
||||
|
||||
/** |
||||
* @return indicates if the line is smooth of flat |
||||
*/ |
||||
public boolean isSmooth() { |
||||
return smooth; |
||||
} |
||||
|
||||
/** |
||||
* @return the length of this bezier line |
||||
*/ |
||||
public float getLength() { |
||||
return length; |
||||
} |
||||
|
||||
/** |
||||
* @return indicates if the current line is cyclic or not |
||||
*/ |
||||
public boolean isCyclic() { |
||||
return cyclic; |
||||
} |
||||
} |
||||
} |
||||
Loading…
Reference in new issue