Function SetupCamera

kaplademo/source/kaplaDemo/SampleViewer.cpp:1086–1149

// ------------------------------------------------------------------------------------

void SetupCamera(bool mirrored = false)
{
	glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
	float aspectRatio = ((float)glutGet(GLUT_WINDOW_WIDTH)/(float)glutGet(GLUT_WINDOW_HEIGHT));
	gluPerspective(gCamera.fov, aspectRatio, zNear, zFar);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	if (gCamera.trackballMode) {
		gCamera.trackballCenter.x = 0.0f;
		gCamera.trackballCenter.z = 0.0f;
		gCamera.pos = gCamera.trackballCenter - gCamera.forward * gCamera.trackballRadius;
	}


	gSampleScene->getCamera(gCamera.pos, gCamera.forward);

	PxVec3 pos = gCamera.pos;
	PxVec3 dir = gCamera.forward;
	PxVec3 apos = gCamera.pos + dir;

	
	gluLookAt(pos.x, pos.y, pos.z, pos.x + dir.x, pos.y + dir.y, pos.z + dir.z, 0.0f, 1.0f, 0.0f);

	if (mirrored) {
		PxTransform trans;

		PxVec3 waterN(0.0f, 1.0f, 0.0f);
		PxVec3 waterP(0.0f,gGroundY,0.0f);
		float QQQ = 0.00f;
		waterP.y += QQQ;
		float np2 = 2.0f*waterN.dot(waterP);

		PxVec3 r0 = PxVec3(1.0f, 0.0f, 0.0f) - 2*waterN.x*waterN;
		PxVec3 r1 = PxVec3(0.0f, 1.0f, 0.0f) - 2*waterN.y*waterN;
		PxVec3 r2 = PxVec3(0.0f, 0.0f, 1.0f) - 2*waterN.z*waterN;
		PxVec3 t = np2*waterN;

		float matGL[16] = {
			r0.x, r1.x, r2.x, 0.0f,
			r0.y, r1.y, r2.y, 0.0f,
			r0.z, r1.z, r2.z, 0.0f,
			t.x,  t.y,  t.z,  1.0f};

		glMultMatrixf(matGL);

	}


	glGetFloatv(GL_MODELVIEW_MATRIX, modelMatrix);
	glGetFloatv(GL_PROJECTION_MATRIX, projMatrix);

	gDefaultShader->updateCamera(modelMatrix, projMatrix);
	if (gSampleScene != NULL) {
		for (int i = 0; i < (int)gSampleScene->getShaders().size(); i++)
			gSampleScene->getShaders()[i]->updateCamera(modelMatrix, projMatrix);
		gSampleScene->setCamera(gCamera.pos, gCamera.forward, PxVec3(0,1,0), gCamera.fov);