void drawGround(const p3d::Texture &texture) {
texture.bind(0);
Vector4 saveLight=p3d::lightPosition[0];
p3d::modelviewMatrix.push();
p3d::modelviewMatrix.rotate(-90,Vector3(1,0,0));
p3d::lightPosition[0]=p3d::modelviewMatrix.transform(Vector4(0,0,2));
p3d::modelviewMatrix.scale(Vector3(50,50,1));
p3d::uniformTransformation();
p3d::uniformLight();
p3d::drawSquare();
p3d::modelviewMatrix.pop();
p3d::lightPosition[0]=saveLight;
}
void drawTexture(const p3d::Texture &texture,double x,double y,double w,double h,bool depthTexture) {
texture.bind(0);
p3d::modelviewMatrix.push();
p3d::projectionMatrix.push();
p3d::projectionMatrix=Matrix4::fromOrtho(0,1,0,1,0,1);
// square is drawn in [-1,1]
p3d::modelviewMatrix.setIdentity();
p3d::modelviewMatrix.translate(x,y,-0.00001);
p3d::modelviewMatrix.scale(w/2.0,h/2.0,1);
p3d::modelviewMatrix.translate(1,1,0);
if (depthTexture)
p3d::shaderTextureDepth();
else
p3d::shaderTextureAmbient();
p3d::drawSquare();
p3d::projectionMatrix.pop();
p3d::modelviewMatrix.pop();
}