void QuadWarp ::apply(ofRectangle sourceRect){
// we set it to the default - 0 translation
// and 1.0 scale for x y z and w
for(int i = 0; i < 16; i++) {
if(i % 5 != 0) _glWarpMatrix[i] = 0.0;
else _glWarpMatrix[i] = 1.0;
}
// source and destination points
double src[4][2];
double dest[4][2];
// we set the warp coordinates
// source coordinates as the dimensions of our window
src[0][0] = sourceRect.x;
src[0][1] = sourceRect.y;
src[1][0] = sourceRect.width;
src[1][1] = sourceRect.y;
src[2][0] = sourceRect.width;
src[2][1] = sourceRect.height;
src[3][0] = sourceRect.x;
src[3][1] = sourceRect.height;
// corners are in 0.0 - 1.0 range
// so we scale up so that they are at the render scale
for(int i = 0; i < 4; i++){
dest[i][0] = dstPoints[i].x;// * (float) width;
dest[i][1] = dstPoints[i].y;// * (float) height;
}
// perform the warp calculation
mapQuadToQuad(src, dest, _warpMatrix);
// copy the values
_glWarpMatrix[0] = _warpMatrix[0][0];
_glWarpMatrix[1] = _warpMatrix[0][1];
_glWarpMatrix[3] = _warpMatrix[0][2];
_glWarpMatrix[4] = _warpMatrix[1][0];
_glWarpMatrix[5] = _warpMatrix[1][1];
_glWarpMatrix[7] = _warpMatrix[1][2];
_glWarpMatrix[12] = _warpMatrix[2][0];
_glWarpMatrix[13] = _warpMatrix[2][1];
_glWarpMatrix[15] = _warpMatrix[2][2];
// finally lets multiply our matrix
glMultMatrixf(_glWarpMatrix);
};
void phdWarper::calcWarpMatrix() {
// perform the warp calculation
resetWarpMatrix();
// perform the warp calculation
mapQuadToQuad(_src, _dst, _warpMatrix);
// copy the values
glWarpMatrix[0] = _warpMatrix[0][0];
glWarpMatrix[1] = _warpMatrix[0][1];
glWarpMatrix[3] = _warpMatrix[0][2];
glWarpMatrix[4] = _warpMatrix[1][0];
glWarpMatrix[5] = _warpMatrix[1][1];
glWarpMatrix[7] = _warpMatrix[1][2];
glWarpMatrix[12] = _warpMatrix[2][0];
glWarpMatrix[13] = _warpMatrix[2][1];
glWarpMatrix[15] = _warpMatrix[2][2];
changed = false;
}
