Separate_specular_color

OpenGL
1

Hi,

Do you know if there are some known issues about GL_SEPARATE_SPECULAR_COLOR and mac ?
I have already searched the “mac-opengl” apple mailing list and other forums here…
With a GL_MODULATE texture env., everything is displayed as if I had choosen GL_SINGLE_COLOR.
… please tell me it does not come from my code.

JC.

2

What hardware? EXT_separate_specular_color should work on any hardware renderer except for the Rage128. On the GeForce2MX/4MX, the extension was not exported on 10.2, but it is on 10.3.

3

Thank you for the answer, I will try using EXT_separate_specular_color instead of GL_SEPARATE_SPECULAR_COLOR.
My hardware is ATI Mobility Radeon 9200 (iBook G4) and OS 10.3.4.

The code I wrote is:

…

glClearColor ( 0.5f , 0.5f , 0.5f , 0.f );
glClear ( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

// la caméra
glViewport ( 0 , 0 , _Width , _Height );

glMatrixMode ( GL_PROJECTION );
glLoadIdentity ();
gluPerspective ( 60 , 1 , .01 , 10 );

gluLookAt ( camPos[0] , camPos[1] , camPos[2] ,
target[0] , target[1] , target[2] ,
upVec[0] , upVec[1] , upVec[2] );

glMatrixMode ( GL_MODELVIEW );
glLoadIdentity ();

glEnable ( GL_LIGHTING );
glEnable ( GL_LIGHT0 );
glEnable ( GL_DEPTH_TEST );
glEnable ( GL_CULL_FACE );

glLightfv ( GL_LIGHT0 , GL_POSITION , position );
float white[4] = { 1.f , 1.f , 1.f , 1.f };
glLightfv ( GL_LIGHT0 , GL_SPECULAR , white );

float mAmbient[4] = { .4f , .4f , .4f , 1.f };
glLightModelfv ( GL_LIGHT_MODEL_AMBIENT , mAmbient );

glShadeModel ( GL_SMOOTH );

glTexEnvi ( GL_TEXTURE_ENV , GL_TEXTURE_ENV_MODE , GL_MODULATE );

glEnable ( GL_TEXTURE_2D );
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexGeni (GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
glTexGeni (GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
glEnable ( GL_TEXTURE_GEN_S );
glEnable ( GL_TEXTURE_GEN_T );

glBindTexture ( GL_TEXTURE_2D , tex -> _Name );

glLightModeli ( GL_LIGHT_MODEL_COLOR_CONTROL ,
GL_SEPARATE_SPECULAR_COLOR );

float diffuse[4] = { _Material->_Diffuse.R , _Material->_Diffuse.G , _Material->_Diffuse.B , _Material->_Diffuse.A };
glMaterialfv ( GL_FRONT , GL_DIFFUSE , diffuse );
float ambient[4] = { _Material->_Ambient.R , _Material->_Ambient.G , _Material->_Ambient.B , _Material->_Ambient.A };
glMaterialfv ( GL_FRONT , GL_AMBIENT , ambient );
float emission[4] = { _Material->_Emission.R , _Material->_Emission.G , _Material->_Emission.B , _Material->_Emission.A };
glMaterialfv ( GL_FRONT , GL_EMISSION , emission );

float specular[4] = { _Material->_Specular.R , _Material->_Specular.G , _Material->_Specular.B , _Material->_Specular.A };
glMaterialfv ( GL_FRONT , GL_SPECULAR , specular );
glMateriali ( GL_FRONT , GL_SHININESS , _Material->_Shininess );

GLUquadricObj * sphere = gluNewQuadric();
gluQuadricDrawStyle ( sphere , GLU_FILL );
gluQuadricNormals ( sphere , GLU_SMOOTH );
gluSphere ( sphere , 3.f , 32 , 32 );

4

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