ClientState & MultiTexture & Shading Language

OpenGL OpenGL: Advanced Coding
1 
void CStreamModel::Draw()
{	
	//glutSolidSphere(1.0,32,32);
	ReBuildHeightMap();
	
	glEnableClientState(GL_VERTEX_ARRAY);
	glEnableClientState(GL_NORMAL_ARRAY);

	glVertexPointer(3,GL_FLOAT,0,Mesh);
	glNormalPointer(GL_FLOAT,0,Normal);
//	glEnableVertexAttribArray(::AttribTangentSlot);glVertexAttribPointer(::AttribTangentSlot,3,GL_FLOAT,0,0,Tangent);
//	glPushMatrix();
	glClientActiveTextureARB(GL_TEXTURE0);
	glTexCoordPointer(2,GL_FLOAT,0,TexCoord);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);

	glClientActiveTextureARB(GL_TEXTURE1);
	glTexCoordPointer(2,GL_FLOAT,0,TexCoord);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);

	glActiveTexture(GL_TEXTURE0);
	glBindTexture(GL_TEXTURE_2D,RefractMap);

	glActiveTexture(GL_TEXTURE1);
	glBindTexture(GL_TEXTURE_2D,NormalMap);

	glDrawElements(GL_TRIANGLE_STRIP,7936,GL_UNSIGNED_SHORT,VertexIndex);
//	glPopMatrix();

	glDisableClientState(GL_VERTEX_ARRAY);
	glDisableClientState(GL_NORMAL_ARRAY);
//	glDisableVertexAttribArray(::AttribTangentSlot);

//	glClientActiveTextureARB(GL_TEXTURE0_ARB);
};

the texture handles “RefractMap” and “normalMap” is ok.

I just bind the RefractMap to texture unit 0,and the NormalMap to unit 1,so i can make bump mapping in my fragment shader.

 
attribute vec3 Tangent;
void main(void)
{
	gl_Position = ftransform();
	gl_TexCoord[0].xy = gl_MultiTexCoord0.xy;
	gl_TexCoord[1].xy = gl_MultiTexCoord1.xy;
}
 

  
uniform sampler2D		ColorMap;
uniform sampler2D		NormalMap;
void main(void)
{
	gl_FragColor = texture2D(ColorMap,gl_TexCoord[0].xy);// + texture2D(NormalMap,gl_TexCoord[1].xy);
}

but… even I changed the ColorMap to NormalMap,i can’t see the normals map,all the same the color map.

I think maybe the problems is on the server-side or unit and client-side…

Thanks

2

i thnk u r confused normally u only need
glClientActiveTextureARB(GL_TEXTURE0);
glTexCoordPointer(2,GL_FLOAT,0,TexCoord);

u only need more than texcoord0 if the mesh has different texturecoords, colormaps + normalmaps normally share the same texturecoords, so u need

attribute vec3 Tangent;
void main(void)
{
	gl_Position = ftransform();
	gl_TexCoord[0].xy = gl_MultiTexCoord0.xy;
}
 

code:

  
uniform sampler2D		ColorMap;
uniform sampler2D		NormalMap;
void main(void)
{
	gl_FragColor = texture2D(ColorMap,gl_TexCoord[0].xy) + texture2D(NormalMap,gl_TexCoord[0].xy);
}

of course the above will visually look wrong since youre using normalmap incorrectly

3

Did you set the glsl sampler uniforms correctly?