const Matrix4& Perspective::getPerspectiveMatrix()
{
if(myNeedUpdate)
computePerspectiveMatrix();
return myPerspectiveMatrix;
}
/* init()
*
* Set up background, clearcolor, call setupViewport(width, height).
*/
void init() {
// glClearColor(8.0, 0.4, 0.0, 1.0);
glClearColor(0, 0, 0, 1);
glColor3f(0.5, 0.5, 0.5);
setupViewport(INITIAL_WIDTH, INITIAL_HEIGHT);
LookAtX = LookAtY = LookAtZ = 0.0f;
/***** initialize matrix transforms *****/
// Initial entries for translation matrix
float ttv_entries[16] = { 1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
TranslateToViewer << ttv_entries;
// Initial entries for first rotation matrix
float rot1[16] = { 0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
Rotate1 << rot1;
// Initial entries for second rotation matrix
float rot2[16] = { 0, 0, 0, 0,
0, 1, 0, 0,
0, 0, 0, 0,
0, 0, 0, 1 };
Rotate2 << rot2;
// Initial entries for third rotation matrix
float rot3[16] = { 1, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 1 };
Rotate3 << rot3;
// Matrix to flip handedness
float fh[16] = { 1, 0, 0, 0,
0, -1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
FlipHandedness << fh;
// Initial entries for P
float pentries[] = { ViewPlaneDist, 0, 0, 0,
0, ViewPlaneDist, 0, 0,
0, 0, 0, 1,
0, 0, 0, 0 };
P << pentries;
// Initial entries for W
float ws[] = { 0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
W << ws;
// Calculate the view pipeline for first time
computeViewerAngle(0);
computePerspectiveMatrix(0);
computeWindowMatrix(0);
V = TranslateToViewer * Rotate1 * Rotate2 * Rotate3 * FlipHandedness;
}
void refreshWindowAndPerspective(int id) {
computeWindowMatrix(id);
computePerspectiveMatrix(id);
}
