Textured cube with model loading.

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

cube.obj

@@ -0,0 +1,26 @@
+v 0 0 0
+v 0 0 1
+v 0 1 0
+v 0 1 1
+v 1 0 0
+v 1 0 1
+v 1 1 0
+v 1 1 1
+
+vt 0 0 #1
+vt 0 1 #2
+vt 1 0 #3
+vt 1 1 #4
+
+f 1/2 3/1 7/3
+f 1/2 7/3 8/4
+f 5/2 7/1 8/3
+f 5/2 8/3 6/4
+f 6/2 8/1 4/3
+f 6/2 4/3 2/4
+f 2/2 4/1 3/3
+f 2/2 3/3 1/4
+f 3/2 4/1 8/3
+f 3/2 8/3 7/4
+f 6/2 2/1 1/3
+f 6/2 1/3 5/4

src/sig/Mesh.java

@@ -1,11 +1,24 @@
 package sig;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
+import sig.utils.OBJReader;
+
 public class Mesh {
     List<Triangle> triangles = new ArrayList<>();
     Mesh(List<Triangle> tris) {
         this.triangles=tris;
     }
+    Mesh(String obj) {
+        this.triangles=OBJReader.ReadOBJFile(obj,false);
+    }
+    Mesh(String obj,String tex) {
+        this.triangles=OBJReader.ReadOBJFile(obj,true);
+        Texture te = new Texture(new File(tex));
+        for (Triangle t : triangles) {
+            t.tex=te;
+        }
+    }
 }

src/sig/Panel.java

@@ -114,7 +114,7 @@ public class Panel extends JPanel implements Runnable {
             triTransformed.T = t.T;
             triTransformed.U = t.U;
             triTransformed.V = t.V;
-            triTransformed.textured = t.textured;
+            triTransformed.tex = t.tex;
 
             Vector normal=new Vector(),line1=new Vector(),line2=new Vector();
             line1 = Vector.subtract(triTransformed.B,triTransformed.A);
@@ -139,7 +139,7 @@ public class Panel extends JPanel implements Runnable {
                 triViewed.T = triTransformed.T;
                 triViewed.U = triTransformed.U;
                 triViewed.V = triTransformed.V;
-                triViewed.textured = triTransformed.textured;
+                triViewed.tex = triTransformed.tex;
 
                 int clippedTriangles = 0;
                 Triangle[] clipped = new Triangle[]{new Triangle(),new Triangle()};
@@ -153,7 +153,7 @@ public class Panel extends JPanel implements Runnable {
                     triProjected.B = Matrix.MultiplyVector(SigRenderer.matProj,clipped[i].B);
                     triProjected.C = Matrix.MultiplyVector(SigRenderer.matProj,clipped[i].C);
                     triProjected.col = clipped[i].col;
-                    triProjected.textured = clipped[i].textured;
+                    triProjected.tex = clipped[i].tex;
                     triProjected.T = (Vector2)clipped[i].T.clone();
                     triProjected.U = (Vector2)clipped[i].U.clone();
                     triProjected.V = (Vector2)clipped[i].V.clone();
@@ -230,12 +230,12 @@ public class Panel extends JPanel implements Runnable {
             }
 
             for (Triangle tt : triList) {
-                if (tt.textured) {
+                if (tt.tex!=null) {
                     DrawUtils.TexturedTriangle(p, 
                         (int)tt.A.x,(int)tt.A.y,tt.T.u,tt.T.v,tt.T.w,
                         (int)tt.B.x,(int)tt.B.y,tt.U.u,tt.U.v,tt.U.w,
                         (int)tt.C.x,(int)tt.C.y,tt.V.u,tt.V.v,tt.V.w,
-                    SigRenderer.dirtTex,tt.col.getRed());
+                    tt.tex,tt.col.getRed());
                 } else {
                     DrawUtils.FillTriangle(p,(int)tt.A.x,(int)tt.A.y,(int)tt.B.x,(int)tt.B.y,(int)tt.C.x,(int)tt.C.y,tt.getColor());
                 }

src/sig/SigRenderer.java

@@ -79,8 +79,6 @@ public class SigRenderer implements KeyListener,MouseListener,MouseMotionListene
     }
 
     SigRenderer(JFrame f) {
-        dirtTex = new Texture(new File("dirt.png"));
-
         //cube = new Mesh(OBJReader.ReadOBJFile("teapot.obj",false));
         cube = new Mesh(Arrays.asList(
             new Triangle[]{
@@ -98,10 +96,6 @@ public class SigRenderer implements KeyListener,MouseListener,MouseMotionListene
                 new Triangle(new Vector(1,0,1),new Vector(0,0,0),new Vector(1,0,0),new Vector2(0,1),new Vector2(1,0),new Vector2(1,1)),
             }));
 
-        for (Triangle t : cube.triangles) {
-            t.textured=true;
-        }
-
         Panel p = new Panel();
 
         f.getContentPane().addMouseListener(this);

src/sig/Triangle.java

@@ -5,7 +5,7 @@ public class Triangle {
     Vector A,B,C;
     Vector2 T,U,V;
     Color col = Color.WHITE;
-    public boolean textured=false;
+    public Texture tex = null;
     public Triangle() {
         this(new Vector(),new Vector(),new Vector());
     }
@@ -87,7 +87,7 @@ public class Triangle {
         if (insidePointCount==1&&outsidePointCount==2) {
             ExtraData t = new ExtraData(0);
             out_tri[0].col = in.col;
-            out_tri[0].textured = in.textured;
+            out_tri[0].tex = in.tex;
             out_tri[0].A = inside_points[0];
             out_tri[0].T = inside_tex[0];
             out_tri[0].B = Vector.IntersectPlane(plane_p, plane_n, inside_points[0], outside_points[0],t);
@@ -103,7 +103,7 @@ public class Triangle {
         if (insidePointCount==2&&outsidePointCount==1) {
             ExtraData t = new ExtraData(0);
             out_tri[0].col=out_tri[1].col=in.col;
-            out_tri[0].textured=out_tri[1].textured=in.textured;
+            out_tri[0].tex=out_tri[1].tex=in.tex;
             out_tri[0].A = inside_points[0];
             out_tri[0].B = inside_points[1];
             out_tri[0].T = inside_tex[0];

src/sig/utils/OBJReader.java

@@ -31,26 +31,25 @@ public class OBJReader {
                     Triangle tri = new Triangle(
                         new Vector(
                             vertices.get(Integer.parseInt(spl1[0])-1)[0],
-                            vertices.get(Integer.parseInt(spl2[0])-1)[1],
+                            vertices.get(Integer.parseInt(spl1[0])-1)[1],
-                            vertices.get(Integer.parseInt(spl3[0])-1)[2]),
+                            vertices.get(Integer.parseInt(spl1[0])-1)[2]),
                         new Vector(
-                            vertices.get(Integer.parseInt(spl1[0])-1)[0],
+                            vertices.get(Integer.parseInt(spl2[0])-1)[0],
                             vertices.get(Integer.parseInt(spl2[0])-1)[1],
-                            vertices.get(Integer.parseInt(spl3[0])-1)[2]),
+                            vertices.get(Integer.parseInt(spl2[0])-1)[2]),
                         new Vector(
-                            vertices.get(Integer.parseInt(spl1[0])-1)[0],
+                            vertices.get(Integer.parseInt(spl3[0])-1)[0],
-                            vertices.get(Integer.parseInt(spl2[0])-1)[1],
+                            vertices.get(Integer.parseInt(spl3[0])-1)[1],
                             vertices.get(Integer.parseInt(spl3[0])-1)[2]),
                         new Vector2(
                             texs.get(Integer.parseInt(spl1[1])-1)[0],
+                            texs.get(Integer.parseInt(spl1[1])-1)[1]),
+                        new Vector2(
+                            texs.get(Integer.parseInt(spl2[1])-1)[0],
                             texs.get(Integer.parseInt(spl2[1])-1)[1]),
                         new Vector2(
-                            texs.get(Integer.parseInt(spl1[1])-1)[0],
+                            texs.get(Integer.parseInt(spl3[1])-1)[0],
-                            texs.get(Integer.parseInt(spl2[1])-1)[1]),
+                            texs.get(Integer.parseInt(spl3[1])-1)[1]));
-                        new Vector2(
-                            texs.get(Integer.parseInt(spl1[1])-1)[0],
-                            texs.get(Integer.parseInt(spl2[1])-1)[1]));
-                    tri.textured=textured; 
                     tris.add(tri);
                 } else {
                     Triangle tri = new Triangle(
@@ -66,7 +65,6 @@ public class OBJReader {
                             vertices.get(Integer.parseInt(split[3])-1)[0],
                             vertices.get(Integer.parseInt(split[3])-1)[1],
                             vertices.get(Integer.parseInt(split[3])-1)[2]));
-                    tri.textured=textured;
                     tris.add(tri);
                 }
             }