source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Transform3.cpp @ 2960

#include "Transform3.h"
#include "RenderState.h"


namespace CHCDemoEngine 
{

CGparameter Transform3::sModelMatrixParam;


Transform3::Transform3(const Matrix4x4 &trafo): mMatrix(trafo)
{
        mIsIdentity = false;
}


Transform3::Transform3()
{
        Reset();
}


void Transform3::Load(RenderState *state)
{
        if (mIsIdentity) return;
        
        // note: would not need to pass the model matrix, 
        // as all required information is avaiabl in the glstate
        // however, we require it compute the word positions,
        // as computing the world position by use the inverse of the viewprojection
        // matrix turned out to be too inaccurate for temporal reprojection

        if (state->GetRenderPassType() == RenderState::DEFERRED)
        {
                cgGLSetMatrixParameterfc(sModelMatrixParam, (const float *)mMatrix.x);
        }

        glPushMatrix();
        glMultMatrixf((float *)mMatrix.x);
}


void Transform3::Unload(RenderState *state)
{
        if (mIsIdentity) return;

        // reset model matrix
        if (state->GetRenderPassType() == RenderState::DEFERRED)
        {
                static Matrix4x4 identity = IdentityMatrix();
                cgGLSetMatrixParameterfc(sModelMatrixParam, (const float *)identity.x);
        }

        glPopMatrix();
}


void Transform3::MultMatrix(const Matrix4x4 &trafo)
{
        mIsIdentity = false;
        mMatrix = mMatrix * trafo;
}


void Transform3::Reset()
{
        mIsIdentity = true;
        mMatrix = IdentityMatrix();
}


}