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Simple Vertex Arrays (i cant)


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#1 Marvin   Members   -  Reputation: 127

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Posted 06 September 2001 - 08:47 AM

Im trying to get the most basic vertex arrays working (so i can use them in my engine), but i cant even get the simplest vertex arrays working. Bellow is what im trying, i must be doing something very wrong that i hope a pro can spot GLfloat test[] = {0.0f,2.0f,0.0f, 1.0f,0.0f,0.0f -1.0f,0.0f,0.0f}; GLuint index[] = {0,1,2}; glVertexPointer(3, GL_FLOAT, 0, test); glEnableClientState(GL_VERTEX_ARRAY); glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_INT, index); Even better could someone post complete code (well minus framework) for rendering a single triangle using vertex arrays

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#2 Null and Void   Moderators   -  Reputation: 1087

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Posted 06 September 2001 - 10:10 AM

Try this:
  
GLfloat test[] = {0.0f,2.0f,0.0f,
1.0f,0.0f,0.0f
-1.0f,0.0f,0.0f};

glEnableClientState(GL_VERTEX_ARRAY);

glVertexPointer(3, GL_FLOAT, 0, test);
glDrawArrays(GL_TRIANGLES, 0, 3);



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#3 zedzeek   Members   -  Reputation: 528

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Posted 06 September 2001 - 11:15 AM

both methods should work

try this

GLfloat test[] = {0.0f,2.0f,0.0f,
1.0f,0.0f,0.0f
-1.0f,0.0f,0.0f};

glBegin( GL_TRIANGLES );
glVertex3fv( &test[0] );
glVertex3fv( &test[3] );
glVertex3fv( &test[6] );
glEnd();

if this doesnt work then the problem doesnt lie with the vertex arrays

#4 Marvin   Members   -  Reputation: 127

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Posted 06 September 2001 - 11:47 PM

I tried as posted by Zedzeek last night, and still didnt have a damn thing rendered, i found the problem to lie in the near clipping plane, thanks for the help




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