Combining textures in a fly
Author
Hi yall,
Without any crap talking, here''s my noodle scratcher: I want to blend
two (or more) textures together in a fly. I need this for my isometric
engine so that I can ''smooth'' terrain edges when the terrain tile type
changes, e.g. snow -> grass.
grass -> layer[0]
+
snow -> layer[1]
Should be vertice based. I figured this could be done easily...
shouldn''t be much different from coloring vertices, right?
Here is how I draw a tile:
----snip----
glBindTexture(GL_TEXTURE_2D, tiletexture[Id]);
glBegin(GL_TRIANGLE_STRIP);
/* I would add something here? */
glTexCoord2f(0.0f, 0.0f);
/* ...or here? */
SetVertexColor(...); // very basic light effect
/* What about here? */
glVertex2f(float(x), float(y));
...
---snip---
So, any suggestions?
Thanks.
saeZ
unless u want to use some less supported extensions u will need to encode the blending alpha in one of the textures + then u can use
A/ (2 passes)
draw texA, enable blend (src_alpha, one-src_alpha) draw texB
B/ (1 pass but impossible to do lighting on both textures)
use the combine extension(in opengl1.3) + use the interpolate part
http://uk.geocities.com/sloppyturds/gotterdammerung.html
A/ (2 passes)
draw texA, enable blend (src_alpha, one-src_alpha) draw texB
B/ (1 pass but impossible to do lighting on both textures)
use the combine extension(in opengl1.3) + use the interpolate part
http://uk.geocities.com/sloppyturds/gotterdammerung.html
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