void TinyGLRenderer::setupCameraPerspective(float pitch, float heading, float fov) {
// TODO: Find a correct and exact formula for the FOV
TGLfloat glFOV = 0.63 * fov; // Approximative and experimental formula
if (fov > 79.0 && fov < 81.0)
glFOV = 50.5; // Somewhat good value for fov == 80
else if (fov > 59.0 && fov < 61.0)
glFOV = 36.0; // Somewhat good value for fov == 60
// NOTE: tinyGL viewport implementation needs to be checked as it doesn't behave the same as openGL
tglViewport(0, kTopBorderHeight, kOriginalWidth, kFrameHeight);
tglMatrixMode(TGL_PROJECTION);
tglLoadIdentity();
Math::Matrix4 m = Math::makePerspectiveMatrix(glFOV, (TGLfloat)kOriginalWidth / (TGLfloat)kFrameHeight, 1.0, 10000.0);
tglMultMatrixf(m.getData());
// Rotate the model to simulate the rotation of the camera
tglMatrixMode(TGL_MODELVIEW);
tglLoadIdentity();
tglRotatef(pitch, -1.0f, 0.0f, 0.0f);
tglRotatef(heading - 180.0f, 0.0f, 1.0f, 0.0f);
tglGetFloatv(TGL_MODELVIEW_MATRIX, _cubeModelViewMatrix);
tglGetFloatv(TGL_PROJECTION_MATRIX, _cubeProjectionMatrix);
tglGetIntegerv(TGL_VIEWPORT, (TGLint *)_cubeViewport);
}
void GfxTinyGL::getBoundingBoxPos(const Mesh *model, int *x1, int *y1, int *x2, int *y2) {
if (_currentShadowArray) {
*x1 = -1;
*y1 = -1;
*x2 = -1;
*y2 = -1;
return;
}
TGLfloat top = 1000;
TGLfloat right = -1000;
TGLfloat left = 1000;
TGLfloat bottom = -1000;
TGLfloat winX, winY, winZ;
for (int i = 0; i < model->_numFaces; i++) {
Graphics::Vector3d v;
float* pVertices;
for (int j = 0; j < model->_faces[i]._numVertices; j++) {
TGLfloat modelView[16], projection[16];
TGLint viewPort[4];
tglGetFloatv(TGL_MODELVIEW_MATRIX, modelView);
tglGetFloatv(TGL_PROJECTION_MATRIX, projection);
tglGetIntegerv(TGL_VIEWPORT, viewPort);
pVertices = model->_vertices + 3 * model->_faces[i]._vertices[j];
v.set(*(pVertices), *(pVertices + 1), *(pVertices + 2));
tgluProject(v.x(), v.y(), v.z(), modelView, projection, viewPort, &winX, &winY, &winZ);
if (winX > right)
right = winX;
if (winX < left)
left = winX;
if (winY < top)
top = winY;
if (winY > bottom)
bottom = winY;
}
}
float t = bottom;
bottom = 480 - top;
top = 480 - t;
if (left < 0)
left = 0;
if (right > 639)
right = 639;
if (top < 0)
top = 0;
if (bottom > 479)
bottom = 479;
if (top > 479 || left > 639 || bottom < 0 || right < 0) {
*x1 = -1;
*y1 = -1;
*x2 = -1;
*y2 = -1;
return;
}
*x1 = (int)left;
*y1 = (int)top;
*x2 = (int)right;
*y2 = (int)bottom;
/*
uint16 *dst = (uint16 *)_zb->pbuf;
uint16 c = 0xffff;
for (int x = left; x <= right; x++) {
WRITE_LE_UINT16(dst + 640 * (int)top + x, c);
}
for (int x = left; x <= right; x++) {
WRITE_LE_UINT16(dst + 640 * (int)bottom + x, c);
}
for (int y = top; y <= bottom; y++) {
WRITE_LE_UINT16(dst + 640 * y + (int)left, c);
}
for (int y = top; y <= bottom; y++) {
WRITE_LE_UINT16(dst + 640 * y + (int)right, c);
}*/
}
