/////////////////////////////////////////////////////////
// Rotate a frame around it's local Y axis
void gltRotateFrameLocalY(GLTFrame *pFrame, GLfloat fAngle)
{
GLTMatrix mRotation;
GLTVector3 vNewForward;
gltRotationMatrix((float)gltDegToRad(fAngle), 0.0f, 1.0f, 0.0f, mRotation);
gltRotationMatrix(fAngle, pFrame->vUp[0], pFrame->vUp[1], pFrame->vUp[2], mRotation);
gltRotateVector(pFrame->vForward, mRotation, vNewForward);
memcpy(pFrame->vForward, vNewForward, sizeof(GLTVector3));
}
// Called to draw scene
void RenderScene(void)
{
// GLTMatrix transformationMatrix; // Storeage for rotation matrix
GLTMatrix rotationMatrix, translationMatrix, transformationMatrix;
static GLfloat yRot = 0.0f; // Rotation angle for animation
yRot += 0.5f;
// Clear the window with current clearing color
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Build a rotation matrix
gltRotationMatrix(gltDegToRad(yRot), 0.0f, 1.0f, 0.0f, transformationMatrix);
transformationMatrix[12] = 0.0f;
transformationMatrix[13] = 0.0f;
transformationMatrix[14] = -2.5f;
glLoadMatrixf(transformationMatrix);
gltDrawTorus(0.35f, 0.15f, 40, 20);
// Do the buffer Swap
glutSwapBuffers();
}
