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Index array fun

Started by Cityhunter Jan 10, 2003 at 2:15 PM 2 replies 450+ views

Original Post

Jan 10, 2003 at 2:15 PM

I''m trying to use glDrawElement to rendering objects. The object is broken down to vertex array, normal array and texture coord array. Using vertex normals I have the vertex array and normal array be the same size. The texture coord array however is larger. Since glDrawElement only takes in one index array how can I get the texture coord array also working with the same index? Does glDrawElement even support textures? I could write a for loop that loops through all the arrays but that''s a lot slower, any ideas?

_DarkWIng_

Jan 10, 2003 at 2:56 PM

all arrays (vrtex, normal, texture0-7, color....) must have same number of elements for VA(R) to work. If you wnat to have same vertex with 2 diferent texture coordinats then you have to duplicate vertex(and normal if used).

You should never let your fears become the boundaries of your dreams.

Structural

Jan 10, 2003 at 3:16 PM

I also have a little question regarding this:
Can I leave out the index array in some way when I draw the vertices? So far I''ve always ended up with an index array whose values are the same as the indexes.

Martee

Jan 10, 2003 at 3:23 PM

Use glDrawArrays() instead of glDrawElements().

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