/**
* Update Frustum
*
* @param gm GameResources
*/
public void calculateFrustum(Matrix4f projectionMatrix, Camera camera) {
float[] clip = new float[16];
Matrix4f.mul(projectionMatrix, Maths.createViewMatrix(camera), clip_);
clip_b.rewind();
clip_.store(clip_b);
clip_b.rewind();
clip_b.get(clip);
m_Frustum[RIGHT][A] = clip[3] - clip[0];
m_Frustum[RIGHT][B] = clip[7] - clip[4];
m_Frustum[RIGHT][C] = clip[11] - clip[8];
m_Frustum[RIGHT][D] = clip[15] - clip[12];
normalizePlane(m_Frustum, RIGHT);
m_Frustum[LEFT][A] = clip[3] + clip[0];
m_Frustum[LEFT][B] = clip[7] + clip[4];
m_Frustum[LEFT][C] = clip[11] + clip[8];
m_Frustum[LEFT][D] = clip[15] + clip[12];
normalizePlane(m_Frustum, LEFT);
m_Frustum[BOTTOM][A] = clip[3] + clip[1];
m_Frustum[BOTTOM][B] = clip[7] + clip[5];
m_Frustum[BOTTOM][C] = clip[11] + clip[9];
m_Frustum[BOTTOM][D] = clip[15] + clip[13];
normalizePlane(m_Frustum, BOTTOM);
m_Frustum[TOP][A] = clip[3] - clip[1];
m_Frustum[TOP][B] = clip[7] - clip[5];
m_Frustum[TOP][C] = clip[11] - clip[9];
m_Frustum[TOP][D] = clip[15] - clip[13];
normalizePlane(m_Frustum, TOP);
m_Frustum[BACK][A] = clip[3] - clip[2];
m_Frustum[BACK][B] = clip[7] - clip[6];
m_Frustum[BACK][C] = clip[11] - clip[10];
m_Frustum[BACK][D] = clip[15] - clip[14];
normalizePlane(m_Frustum, BACK);
m_Frustum[FRONT][A] = clip[3] + clip[2];
m_Frustum[FRONT][B] = clip[7] + clip[6];
m_Frustum[FRONT][C] = clip[11] + clip[10];
m_Frustum[FRONT][D] = clip[15] + clip[14];
normalizePlane(m_Frustum, FRONT);
}
public Ray(Matrix4f proj, Matrix4f view, Vector2f mouse, int width, int height) {
Vector3f v = new Vector3f();
v.x = (((2.0f * mouse.x) / width) - 1) / proj.m00;
v.y = -(((2.0f * mouse.y) / height) - 1) / proj.m11;
v.z = 1.0f;
Matrix4f invert_view = Matrix4f.invert(view, null);
Vector3f ray_direction = new Vector3f();
ray_direction.x = v.x * invert_view.m00 + v.y * invert_view.m10 + v.z * invert_view.m20;
ray_direction.y = v.x * invert_view.m01 + v.y * invert_view.m11 + v.z * invert_view.m21;
ray_direction.z = v.x * invert_view.m02 + v.y * invert_view.m12 + v.z * invert_view.m22;
Vector3f ray_origin = new Vector3f(invert_view.m30, invert_view.m31, invert_view.m32);
init(ray_origin, ray_direction);
}