public static Mesh genNormalLines(Mesh mesh, float scale) {
FloatBuffer vertexBuffer = (FloatBuffer) mesh.getBuffer(Type.Position).getData();
FloatBuffer normalBuffer = (FloatBuffer) mesh.getBuffer(Type.Normal).getData();
ColorRGBA originColor = ColorRGBA.White;
ColorRGBA normalColor = ColorRGBA.Blue;
Mesh lineMesh = new Mesh();
lineMesh.setMode(Mesh.Mode.Lines);
Vector3f origin = new Vector3f();
Vector3f point = new Vector3f();
FloatBuffer lineVertex = BufferUtils.createFloatBuffer(vertexBuffer.limit() * 2);
FloatBuffer lineColor = BufferUtils.createFloatBuffer(vertexBuffer.limit() / 3 * 4 * 2);
for (int i = 0; i < vertexBuffer.limit() / 3; i++) {
populateFromBuffer(origin, vertexBuffer, i);
populateFromBuffer(point, normalBuffer, i);
int index = i * 2;
setInBuffer(origin, lineVertex, index);
setInBuffer(originColor, lineColor, index);
point.multLocal(scale);
point.addLocal(origin);
setInBuffer(point, lineVertex, index + 1);
setInBuffer(normalColor, lineColor, index + 1);
}
lineMesh.setBuffer(Type.Position, 3, lineVertex);
lineMesh.setBuffer(Type.Color, 4, lineColor);
lineMesh.setStatic();
// lineMesh.setInterleaved();
return lineMesh;
}
private static Mesh genTangentLines(Mesh mesh, float scale) {
FloatBuffer vertexBuffer = (FloatBuffer) mesh.getBuffer(Type.Position).getData();
FloatBuffer normalBuffer = (FloatBuffer) mesh.getBuffer(Type.Normal).getData();
FloatBuffer tangentBuffer = (FloatBuffer) mesh.getBuffer(Type.Tangent).getData();
FloatBuffer binormalBuffer = null;
if (mesh.getBuffer(Type.Binormal) != null) {
binormalBuffer = (FloatBuffer) mesh.getBuffer(Type.Binormal).getData();
}
ColorRGBA originColor = ColorRGBA.White;
ColorRGBA tangentColor = ColorRGBA.Red;
ColorRGBA binormalColor = ColorRGBA.Green;
ColorRGBA normalColor = ColorRGBA.Blue;
Mesh lineMesh = new Mesh();
lineMesh.setMode(Mesh.Mode.Lines);
Vector3f origin = new Vector3f();
Vector3f point = new Vector3f();
Vector3f tangent = new Vector3f();
Vector3f normal = new Vector3f();
IntBuffer lineIndex = BufferUtils.createIntBuffer(vertexBuffer.limit() / 3 * 6);
FloatBuffer lineVertex = BufferUtils.createFloatBuffer(vertexBuffer.limit() * 4);
FloatBuffer lineColor = BufferUtils.createFloatBuffer(vertexBuffer.limit() / 3 * 4 * 4);
boolean hasParity = mesh.getBuffer(Type.Tangent).getNumComponents() == 4;
float tangentW = 1;
for (int i = 0; i < vertexBuffer.limit() / 3; i++) {
populateFromBuffer(origin, vertexBuffer, i);
populateFromBuffer(normal, normalBuffer, i);
if (hasParity) {
tangent.x = tangentBuffer.get(i * 4);
tangent.y = tangentBuffer.get(i * 4 + 1);
tangent.z = tangentBuffer.get(i * 4 + 2);
tangentW = tangentBuffer.get(i * 4 + 3);
} else {
populateFromBuffer(tangent, tangentBuffer, i);
}
int index = i * 4;
int id = i * 6;
lineIndex.put(id, index);
lineIndex.put(id + 1, index + 1);
lineIndex.put(id + 2, index);
lineIndex.put(id + 3, index + 2);
lineIndex.put(id + 4, index);
lineIndex.put(id + 5, index + 3);
setInBuffer(origin, lineVertex, index);
setInBuffer(originColor, lineColor, index);
point.set(tangent);
point.multLocal(scale);
point.addLocal(origin);
setInBuffer(point, lineVertex, index + 1);
setInBuffer(tangentColor, lineColor, index + 1);
// wvBinormal = cross(wvNormal, wvTangent) * -inTangent.w
if (binormalBuffer == null) {
normal.cross(tangent, point);
point.multLocal(-tangentW);
point.normalizeLocal();
} else {
populateFromBuffer(point, binormalBuffer, i);
}
point.multLocal(scale);
point.addLocal(origin);
setInBuffer(point, lineVertex, index + 2);
setInBuffer(binormalColor, lineColor, index + 2);
point.set(normal);
point.multLocal(scale);
point.addLocal(origin);
setInBuffer(point, lineVertex, index + 3);
setInBuffer(normalColor, lineColor, index + 3);
}
lineMesh.setBuffer(Type.Index, 1, lineIndex);
lineMesh.setBuffer(Type.Position, 3, lineVertex);
lineMesh.setBuffer(Type.Color, 4, lineColor);
lineMesh.setStatic();
// lineMesh.setInterleaved();
return lineMesh;
}