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add ramp collision shape

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Gered 2014-01-01 10:31:48 -05:00
parent 69ae42572e
commit bfc8e96b46
1 changed files with 37 additions and 0 deletions
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37
src/main/java/ca/blarg/gdx/tilemap3d/tilemesh/CollisionShapes.java
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@ -24,6 +24,8 @@ public class CollisionShapes {
shapes.put("box-1x2x1", buildBox(-0.5f, -0.5f, -0.5f, 0.5f, 1.5f, 0.5f));
shapes.put("box-0.7x2x0.7", buildBox(-0.35f, -0.5f, -0.35f, 0.35f, 1.5f, 0.35f));
shapes.put("ramp-1x1x1", buildRamp(-0.5f, -0.5f, -0.5f, 0.5f, 0.5f, 0.5f));
}
public static Model get(String shapeName) {
@ -37,6 +39,13 @@ public class CollisionShapes {
return modelBuilder.end();
}
private static Model buildRamp(float ax, float ay, float az, float bx, float by, float bz) {
modelBuilder.begin();
MeshPartBuilder partBuilder = modelBuilder.part("collisionShape", GL10.GL_TRIANGLES, VertexAttributes.Usage.Position, null);
addRampShape(partBuilder, ax, ay, az, bx, by, bz);
return modelBuilder.end();
}
private static void addBoxShape(MeshPartBuilder partBuilder, float ax, float ay, float az, float bx, float by, float bz) {
// TODO: for some reason, ModelBuilder's createBox() creates a box model in a way that BaseModelTileMesh
// collects the vertices from it incorrectly. for now, we just manually create a box's vertices/indices ourself
@ -74,4 +83,32 @@ public class CollisionShapes {
partBuilder.index((short)4, (short)6, (short)1);
partBuilder.index((short)6, (short)3, (short)1);
}
private static void addRampShape(MeshPartBuilder partBuilder, float ax, float ay, float az, float bx, float by, float bz) {
partBuilder.vertex(ax, by, az);
partBuilder.vertex(bx, by, az);
partBuilder.vertex(bx, ay, bz);
partBuilder.vertex(ax, ay, bz);
partBuilder.vertex(bx, ay, az);
partBuilder.vertex(ax, ay, az);
// top (ramp)
partBuilder.index((short)3, (short)2, (short)0);
partBuilder.index((short)2, (short)1, (short)0);
// bottom
partBuilder.index((short)2, (short)3, (short)4);
partBuilder.index((short)3, (short)5, (short)4);
// front
partBuilder.index((short)4, (short)5, (short)1);
partBuilder.index((short)5, (short)0, (short)1);
// left
partBuilder.index((short)5, (short)3, (short)0);
// right
partBuilder.index((short)4, (short)1, (short)2);
}
}