void MOCamera::enable(void)
{
MRenderingContext * render = MEngine::getInstance()->getRenderingContext();
// get viewport
render->getViewport(m_currentViewport);
// projection mode
render->setMatrixMode(M_MATRIX_PROJECTION);
render->loadIdentity();
float ratio = (m_currentViewport[2] / (float)m_currentViewport[3]);
MVector3 scale = getTransformedScale();
MVector3 iScale(1.0f / scale.x, 1.0f / scale.y, 1.0f / scale.z);
MMatrix4x4 iScaleMatrix;
iScaleMatrix.setScale(iScale);
MMatrix4x4 inverseMatrix = ((*getMatrix()) * iScaleMatrix).getInverse();
// perspective view
if(! isOrtho())
{
// normal perspective projection
render->setPerspectiveView(m_fov, ratio, m_clippingNear, m_clippingFar);
// model view mode
render->setMatrixMode(M_MATRIX_MODELVIEW);
render->loadIdentity();
render->multMatrix(&inverseMatrix);
// get current matrices
render->getModelViewMatrix(&m_currentViewMatrix);
render->getProjectionMatrix(&m_currentProjMatrix);
return;
}
// ortho view
float height = m_fov * 0.5f;
float width = height * ratio;
render->setOrthoView(-width, width, -height, height, m_clippingNear, m_clippingFar);
// model view mode
render->setMatrixMode(M_MATRIX_MODELVIEW);
render->loadIdentity();
render->multMatrix(&inverseMatrix);
// get current matrices
render->getModelViewMatrix(&m_currentViewMatrix);
render->getProjectionMatrix(&m_currentProjMatrix);
}
void MOCamera::updateViewMatrix(void)
{
MVector3 scale = getTransformedScale();
MVector3 iScale(1.0f / scale.x, 1.0f / scale.y, 1.0f / scale.z);
MMatrix4x4 iScaleMatrix;
iScaleMatrix.setScale(iScale);
m_currentViewMatrix = ((*getMatrix()) * iScaleMatrix).getInverse();
}
