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Moved OpenGL 2D transform from the modelview matrix to the projection 

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@859 dfc29bdd-3216-0410-991c-e03cc46cb475
master
bitplane 2007-08-23 11:56:54 +00:00
parent b285054559
commit 05cf30845c
1 changed files with 14 additions and 6 deletions
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20
source/Irrlicht/COpenGLDriver.cpp
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@ -1507,13 +1507,22 @@ void COpenGLDriver::setRenderStates2DMode(bool alpha, bool texture, bool alphaCh
GLfloat glmat[16];
core::matrix4 m;
glMatrixMode(GL_PROJECTION);
const core::dimension2d<s32>& renderTargetSize = getCurrentRenderTargetSize();
const core::vector3df translation(-1,1,0);
m.buildProjectionMatrixOrthoLH(f32(renderTargetSize.Width), f32(-renderTargetSize.Height), -1.0, 1.0);
m.setTranslation(translation);
createGLMatrix(glmat, m);
// in render targets, flip the screen
if ( CurrentRendertargetSize.Width != 0 )
{
glmat[5] *= -1.0f;
// because we flipped the screen, triangles are the wrong way around
// triangles are the wrong way around because we flipped the screen
if (ClockwiseWinding)
{
glFrontFace(GL_CCW);
@ -1528,15 +1537,13 @@ void COpenGLDriver::setRenderStates2DMode(bool alpha, bool texture, bool alphaCh
ClockwiseWinding = true;
}
}
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(glmat);
glTranslatef (0.375, 0.375, 0.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// see http://www.opengl.org/resources/faq/technical/transformations.htm#tran0030
const core::dimension2d<s32>& renderTargetSize = getCurrentRenderTargetSize();
gluOrtho2D(0, renderTargetSize.Width, renderTargetSize.Height, 0);
glTranslatef (0.375, 0.375, 0.);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
@ -2420,3 +2427,4 @@ IVideoDriver* createOpenGLDriver(const core::dimension2d<s32>& screenSize,
#endif // _IRR_COMPILE_WITH_OPENGL_