glSolidCone
Author
Hi
I'm wanting to use a solid cone in a game I'm creating. How would I do the following:
1. Create a round shaped code (so far I just get a triangle :-( )
2. Texture map onto the cone (I can with a cube..so I know the process)
3. Position the cone
Thank you in advance.
Andrew
1.) use glutSolidCone or build it yourself (set the vertices, use a triangle strip and fan)
2.) set the texture coordinates of the vertices accordingly (you might use dupicate vertices for the ground disc)
3.) use glTranslate / glRotate
2.) set the texture coordinates of the vertices accordingly (you might use dupicate vertices for the ground disc)
3.) use glTranslate / glRotate
Author
I've managed to use glutSolid cone successfuly in terms of size and position however I'm unaware on how to texture map an object created by glutSolidCone. I can't find tutorials. I can texture map a cube no problem, the vertices are there (accessable) to texture map against.
It could be a better idea going for your idea of a fan and triangle strip. The idea is to add a tree object to my game scene, was going to use a Pyramid but I I'm wanting a rounder shape than blocky.
:)
Andrew
It could be a better idea going for your idea of a fan and triangle strip. The idea is to add a tree object to my game scene, was going to use a Pyramid but I I'm wanting a rounder shape than blocky.
:)
Andrew
Just realized that you need 2 fans instead of a fan and a strip.
Basically it should be doable like this (positions only, texture coords should not be a problem though):
Basically it should be doable like this (positions only, texture coords should not be a problem though):
//basic discglBegin(GL_TRIANGLE_FAN);glVertex3f(0.0f, 0.0f, 0.0f);for(int segment = 0; segment <= numSegments; segment++) //use the second vertex twice{ float angle = 2.0 * PI * ((double)segment/(double)numSegments); //angle in radians glVertex3f(radius * sin(angle), 0.0f, radius * cos(angle)); }glEnd();//coneglBegin(GL_TRIANGLE_FAN);glVertex3f(0.0f, height, 0.0f);for(int segment = numSegments; segment >= 0; segment--) //reverse order for matching polygon winding{ float angle = 2.0 * PI * ((double)segment/(double)numSegments); //angle in radians glVertex3f(radius * sin(angle), 0.0f, radius * cos(angle)); }glEnd();This topic is closed to new replies.
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