colorArray
Author
allo,
lets take the Cube for example but using vertex Arrays this time.
GLfloat corners[] = {8 * 3 vertices};
GLfloat colors[] = {red, green, blue, yellow, cyan, white};
GLubyte indexes[] = {
0,1,2,4, /// Front Face
4,5,1,0, /// Top
3,2,6,7, /// Bottom
5,4,7,6, /// Back
1,5,6,2, /// Right
4,0,3,7 /// Left
};
as there are only 6 Faces, I used 6 colors in the colors Array and and used glShadeModel(GL_FLAT);
but the cube was rendered with only 4 colors namely red,blue,yellow,cyan and 2 other Faces are black.
what was wrong ? your kind assistance please.
if you are using vertex arrays etc, the color values needs to be per-vertex, not per face. This would pose a problem for you, as you share verticies amoungst faces.
if you are using immediate mode (glBegin/glEnd) the color attribute, much like the rest of GL, is a state varaible.
eg:
if you are using immediate mode (glBegin/glEnd) the color attribute, much like the rest of GL, is a state varaible.
eg:
glBegin( GL_QUADS ); for( int i=0; i<6; i++ ) { glColor3fv( &colors.x ); glVertex3fv( &corners[ indexes[0] ].x ); glVertex3fv( &corners[ indexes[1] ].x ); glVertex3fv( &corners[ indexes[2] ].x ); glVertex3fv( &corners[ indexes[3] ].x ); }glEnd();This topic is closed to new replies.
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