public static void generate(TriMesh mesh) {
FloatBuffer tangents = BufferUtils.createFloatBuffer(mesh.getVertexCount() * 3);
FloatBuffer binormals = BufferUtils.createFloatBuffer(mesh.getVertexCount() * 3);
IntBuffer indexBuffer = mesh.getIndexBuffer();
FloatBuffer vertexBuffer = mesh.getVertexBuffer();
FloatBuffer textureBuffer = mesh.getTextureCoords(0).coords;
indexBuffer.rewind();
Vector3f tangent = new Vector3f();
Vector3f binormal = new Vector3f();
Vector3f normal = new Vector3f();
Vector3f verts[] = new Vector3f[3];
Vector2f texcoords[] = new Vector2f[3];
for (int i = 0; i < 3; i++) {
verts[i] = new Vector3f();
texcoords[i] = new Vector2f();
}
for (int t = 0; t < indexBuffer.capacity() / 3; t++) {
int index[] = new int[3];
for (int v = 0; v < 3; v++) {
index[v] = indexBuffer.get();
verts[v].x = vertexBuffer.get(index[v] * 3);
verts[v].y = vertexBuffer.get(index[v] * 3 + 1);
verts[v].z = vertexBuffer.get(index[v] * 3 + 2);
texcoords[v].x = textureBuffer.get(index[v] * 2);
texcoords[v].y = textureBuffer.get(index[v] * 2 + 1);
}
computeTriangleTangentSpace(tangent, binormal, normal, verts, texcoords);
for (int v = 0; v < 3; v++) {
tangents.position(index[v] * 3);
tangents.put(tangent.x);
tangents.put(tangent.y);
tangents.put(tangent.z);
binormals.position(index[v] * 3);
binormals.put(binormal.x);
binormals.put(binormal.y);
binormals.put(binormal.z);
}
}
mesh.setTangentBuffer(tangents);
mesh.setBinormalBuffer(binormals);
}
/**
* @param id
* @param data @Info Stocke le FloatBuffer dans le GPU
*/
public void bufferData() {
buffer = BufferUtils.createFloatBuffer(floatlist.size());
for (Float f : floatlist) {
buffer.put(f);
}
buffer.flip();
glBindBuffer(GL_ARRAY_BUFFER, vboID);
glBufferData(GL_ARRAY_BUFFER, buffer, GL_STATIC_DRAW);
// glBufferSubData(vboID, 0, buffer);
glBindBuffer(GL_ARRAY_BUFFER, 0);
bufferSize = buffer.limit() / 7; // 7 = 3 vertex(x,y,z) + 4 color (r,g,b,a)
}
public FloatBuffer toFloatBuffer() {
final FloatBuffer buffer = BufferUtils.createFloatBuffer(4 * 4);
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
buffer.put(this.m[i][j]);
}
}
buffer.flip();
return buffer;
}
