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GRIM: Fix getScreenBoundingBox for OpenGL with shaders

Browse Source 
Just copy-pasted the contents of the Escape from Monkey Island
code below, and made adjustments based on the diff between
the two functions as they are in the regular OpenGL renderer.
This commit is contained in:
Einar Johan Trøan Sømåen 2021-09-05 21:19:54 +02:00 committed by Paweł Kołodziejski
parent 12f52e627b
commit 7dba601636
1 changed files with 68 additions and 1 deletions
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69
engines/grim/gfx_opengl_shaders.cpp
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@ -518,8 +518,75 @@ void GfxOpenGLS::flipBuffer() {
g_system->updateScreen();
}
void GfxOpenGLS::getScreenBoundingBox(const Mesh *mesh, int *x1, int *y1, int *x2, int *y2) {
void GfxOpenGLS::getScreenBoundingBox(const Mesh *model, int *x1, int *y1, int *x2, int *y2) {
if (_currentShadowArray) {
*x1 = -1;
*y1 = -1;
*x2 = -1;
*y2 = -1;
return;
}
Math::Matrix4 modelMatrix = _currentActor->getFinalMatrix();
Math::Matrix4 mvpMatrix = _mvpMatrix * modelMatrix;
double top = 1000;
double right = -1000;
double left = 1000;
double bottom = -1000;
Math::Vector3d obj;
float *pVertices = nullptr;
for (uint i = 0; i < model->_numFaces; i++) {
for (int j = 0; j < model->_faces[i].getNumVertices(); j++) {
pVertices = model->_vertices + 3 * model->_faces[i].getVertex(j);
obj.set(*(pVertices), *(pVertices + 1), *(pVertices + 2));
Math::Vector4d v = Math::Vector4d(obj.x(), obj.y(), obj.z(), 1.0f);
v = mvpMatrix * v;
v /= v.w();
double winX = (1 + v.x()) / 2.0f * _gameWidth;
double winY = (1 + v.y()) / 2.0f * _gameHeight;
if (winX > right)
right = winX;
if (winX < left)
left = winX;
if (winY < top)
top = winY;
if (winY > bottom)
bottom = winY;
}
}
double t = bottom;
bottom = _gameHeight - top;
top = _gameHeight - t;
if (left < 0)
left = 0;
if (right >= _gameWidth)
right = _gameWidth - 1;
if (top < 0)
top = 0;
if (bottom >= _gameHeight)
bottom = _gameHeight - 1;
if (top >= _gameHeight || left >= _gameWidth || bottom < 0 || right < 0) {
*x1 = -1;
*y1 = -1;
*x2 = -1;
*y2 = -1;
return;
}
*x1 = (int)left;
*y1 = (int)(_gameHeight - bottom);
*x2 = (int)right;
*y2 = (int)(_gameHeight - top);
}
void GfxOpenGLS::getScreenBoundingBox(const EMIModel *model, int *x1, int *y1, int *x2, int *y2) {