CODEWITHSUNDEEP
c++opengltransparencyalphablending
Weaver
Weaver

Reputation: 174

Transparency on certain objects only?

I have managed to get a transparent cube using

glDisable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);

and in shader.frag:

gl_FragColor = vec4(texture2D(TextureMap_uniform, uv).xyz,0.5);

but now I would like the solid model I am moving around above the transparent cubes to be opaque (the transparency is applied to everything at the moment). Can anyone point me in the right direction?

Upvotes: 0

Views: 216

Answers (1)

cfaz
cfaz

Reputation: 186

are you using the same shader ? if yes, then you will need to pass to your shader the information about opacity for each object. a way to do that simply is by using uniform variables.

check out those links :

https://www.khronos.org/opengl/wiki/Uniform_(GLSL) https://www.khronos.org/opengl/wiki/GLAPI/glUniform

Upvotes: 1

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