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masonium

QUADS vs. TRIANGLES

6 posts in this topic

Quad- 4 vertex's
Triangle-3 vertex's *2

SO drawing 2 triangles needs 6 calls to glVertex3f, quads only need 4.

Quads are faster :\

"I've sparred with creatures from the nine hells themselves... I barely plan on breaking a sweat here, today."~Drizzt Do'Urden

Edited by - Drizzt DoUrden on September 26, 2001 11:13:39 PM
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GL_TRIANGLE_STRIP

Quad- 4 vertex''s
Triangle -3 vertex''s *2
Triangle Strip - 4

Better to use GL_TRIANGLE_STRIP instead GL_TRIANGLES if you want to make a quad(ish)
could also be faster than using GL_QUADS, but not buy much, all depends on the hardware
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hi there,

If your using Vertex arrays use GL_QUADS
not GL_TRIANGL_STRIP as for each quad
you would have to make seperate calls
to glDrawArrays(..) as opposed to
one with GL_QUADS.

Hope it helps

Mark.
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the triangle is used in much more hands than quads.
the quad can only make the regular objects,but triangle is the basis of polygons,so every ploygon and complex objects r made of triangles.and triangle-strip is convenient and fast to use in modeling.
for these reasons,i think triangle is more powerful than quad.

jerry2
Programming,make a whole new world.
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Quads cannot handle convex or concave surfaces.
In other words, all 4 points muct lie on a plane.
3 points are the minimum needed to define a plane, so Tri handle wierd shapes better.
So it all comes down to what you are doing.

Landscapes you probably want Tris.
For other things you probably want a mixture.
V''lion


I came, I saw, I got programmers block.
~V''''lion
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