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Feature: added support for linear and constant interpolation types for

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ipo curves.
This commit is contained in:
jmekaelthas 2015-03-25 21:59:48 +01:00
parent a5c98a59be
commit 15ec285b1a
1 changed files with 31 additions and 14 deletions

45
jme3-blender/src/main/java/com/jme3/scene/plugins/blender/curves/BezierCurve.java

@ -1,10 +1,11 @@
package com.jme3.scene.plugins.blender.curves; package com.jme3.scene.plugins.blender.curves;
import java.util.ArrayList;
import java.util.List;
import com.jme3.math.Vector3f; import com.jme3.math.Vector3f;
import com.jme3.scene.plugins.blender.file.DynamicArray; import com.jme3.scene.plugins.blender.file.DynamicArray;
import com.jme3.scene.plugins.blender.file.Structure; import com.jme3.scene.plugins.blender.file.Structure;
import java.util.ArrayList;
import java.util.List;
/** /**
* A class that helps to calculate the bezier curves calues. It uses doubles for performing calculations to minimize * A class that helps to calculate the bezier curves calues. It uses doubles for performing calculations to minimize
@ -12,21 +13,26 @@ import java.util.List;
* @author Marcin Roguski (Kaelthas) * @author Marcin Roguski (Kaelthas)
*/ */
public class BezierCurve { public class BezierCurve {
private static final int IPO_CONSTANT = 0;
private static final int IPO_LINEAR = 1;
private static final int IPO_BEZIER = 2;
public static final int X_VALUE = 0; public static final int X_VALUE = 0;
public static final int Y_VALUE = 1; public static final int Y_VALUE = 1;
public static final int Z_VALUE = 2; public static final int Z_VALUE = 2;
/** /**
* The type of the curve. Describes the data it modifies. * The type of the curve. Describes the data it modifies.
* Used in ipos calculations. * Used in ipos calculations.
*/ */
private int type; private int type;
/** The dimension of the curve. */ /** The dimension of the curve. */
private int dimension; private int dimension;
/** A table of the bezier points. */ /** A table of the bezier points. */
private double[][][] bezierPoints; private double[][][] bezierPoints;
/** Array that stores a radius for each bezier triple. */ /** Array that stores a radius for each bezier triple. */
private double[] radiuses; private double[] radiuses;
/** Interpolation types of the bezier triples. */
private int[] interpolations;
public BezierCurve(final int type, final List<Structure> bezTriples, final int dimension) { public BezierCurve(final int type, final List<Structure> bezTriples, final int dimension) {
this(type, bezTriples, dimension, false); this(type, bezTriples, dimension, false);
@ -44,6 +50,7 @@ public class BezierCurve {
// the third index specifies the coordinates of the specific point in a bezier triple // the third index specifies the coordinates of the specific point in a bezier triple
bezierPoints = new double[bezTriples.size()][3][dimension]; bezierPoints = new double[bezTriples.size()][3][dimension];
radiuses = new double[bezTriples.size()]; radiuses = new double[bezTriples.size()];
interpolations = new int[bezTriples.size()];
int i = 0, j, k; int i = 0, j, k;
for (Structure bezTriple : bezTriples) { for (Structure bezTriple : bezTriples) {
DynamicArray<Number> vec = (DynamicArray<Number>) bezTriple.getFieldValue("vec"); DynamicArray<Number> vec = (DynamicArray<Number>) bezTriple.getFieldValue("vec");
@ -57,7 +64,8 @@ public class BezierCurve {
bezierPoints[i][j][1] = temp; bezierPoints[i][j][1] = temp;
} }
} }
radiuses[i++] = ((Number) bezTriple.getFieldValue("radius")).floatValue(); radiuses[i] = ((Number) bezTriple.getFieldValue("radius")).floatValue();
interpolations[i++] = ((Number) bezTriple.getFieldValue("ipo", IPO_BEZIER)).intValue();
} }
} }
@ -75,10 +83,19 @@ public class BezierCurve {
for (int i = 0; i < bezierPoints.length - 1; ++i) { for (int i = 0; i < bezierPoints.length - 1; ++i) {
if (frame >= bezierPoints[i][1][0] && frame <= bezierPoints[i + 1][1][0]) { if (frame >= bezierPoints[i][1][0] && frame <= bezierPoints[i + 1][1][0]) {
double t = (frame - bezierPoints[i][1][0]) / (bezierPoints[i + 1][1][0] - bezierPoints[i][1][0]); double t = (frame - bezierPoints[i][1][0]) / (bezierPoints[i + 1][1][0] - bezierPoints[i][1][0]);
double oneMinusT = 1.0f - t; switch (interpolations[i]) {
double oneMinusT2 = oneMinusT * oneMinusT; case IPO_BEZIER:
double t2 = t * t; double oneMinusT = 1.0f - t;
return bezierPoints[i][1][valuePart] * oneMinusT2 * oneMinusT + 3.0f * bezierPoints[i][2][valuePart] * t * oneMinusT2 + 3.0f * bezierPoints[i + 1][0][valuePart] * t2 * oneMinusT + bezierPoints[i + 1][1][valuePart] * t2 * t; double oneMinusT2 = oneMinusT * oneMinusT;
double t2 = t * t;
return bezierPoints[i][1][valuePart] * oneMinusT2 * oneMinusT + 3.0f * bezierPoints[i][2][valuePart] * t * oneMinusT2 + 3.0f * bezierPoints[i + 1][0][valuePart] * t2 * oneMinusT + bezierPoints[i + 1][1][valuePart] * t2 * t;
case IPO_LINEAR:
return (1f - t) * bezierPoints[i][1][valuePart] + t * bezierPoints[i + 1][1][valuePart];
case IPO_CONSTANT:
return bezierPoints[i][1][valuePart];
default:
throw new IllegalStateException("Unknown interpolation type for curve: " + interpolations[i]);
}
} }
} }
if (frame < bezierPoints[0][1][0]) { if (frame < bezierPoints[0][1][0]) {