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author | kwolekr <kwolekr@minetest.net> | 2013-04-23 18:39:10 -0400 |
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committer | kwolekr <kwolekr@minetest.net> | 2013-04-23 22:15:51 -0400 |
commit | 770305e28dc0ed9aea0eefe041477a46d64eee58 (patch) | |
tree | 2306e3f96cdb54848c12f5ee159b12cdb55dcfb2 /client/shaders/test_shader_3/opengl_fragment.glsl | |
parent | 36747794ab981e5d1cc085075979ef981e783b55 (diff) | |
download | minetest-770305e28dc0ed9aea0eefe041477a46d64eee58.tar.gz minetest-770305e28dc0ed9aea0eefe041477a46d64eee58.tar.bz2 minetest-770305e28dc0ed9aea0eefe041477a46d64eee58.zip |
Add option to use texture alpha channel
Diffstat (limited to 'client/shaders/test_shader_3/opengl_fragment.glsl')
-rw-r--r-- | client/shaders/test_shader_3/opengl_fragment.glsl | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/client/shaders/test_shader_3/opengl_fragment.glsl b/client/shaders/test_shader_3/opengl_fragment.glsl new file mode 100644 index 000000000..78abadcaf --- /dev/null +++ b/client/shaders/test_shader_3/opengl_fragment.glsl @@ -0,0 +1,23 @@ +
+uniform sampler2D myTexture;
+uniform float fogDistance;
+
+varying vec3 vPosition;
+
+void main (void)
+{
+ vec4 col = texture2D(myTexture, vec2(gl_TexCoord[0]));
+ col *= gl_Color;
+ col = col * col; // SRGB -> Linear
+ col *= 1.8;
+ col.r = 1.0 - exp(1.0 - col.r) / exp(1.0);
+ col.g = 1.0 - exp(1.0 - col.g) / exp(1.0);
+ col.b = 1.0 - exp(1.0 - col.b) / exp(1.0);
+ col = sqrt(col); // Linear -> SRGB
+ float a = col.a; + if(fogDistance != 0.0){
+ float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+ a = mix(a, 0.0, d);
+ }
+ gl_FragColor = vec4(col.r, col.g, col.b, a);
+}
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