blender-archive/source/blender/gpu/shaders/gpu_shader_fire_frag.glsl


in vec3 coords;
out vec4 fragColor;

uniform sampler3D flame_texture;
uniform sampler1D spectrum_texture;

void main()
{
	float flame = texture(flame_texture, coords).r;
	vec4 emission = texture(spectrum_texture, flame);

	fragColor.rgb = emission.a * emission.rgb;
	fragColor.a = emission.a;
}
Fix T47639: OpenGL render with smoke and fire incorrect when using transparency. The issue is that we are rendering to a 0..1 clamped sRGB buffer with unpremultiplied alpha, where the correct thing to do would be to render to an unclamped linear premultiplied alpha buffer. Then we would just make fire purely emissive without affecting the alpha channel at all, but that doesn't work here. So for now, draw fire and smoke separately using different shaders and blend modes, like it used to before the smoke programs were rewritten (see rB0372b642). 2016-08-28 16:50:49 +02:00
Cleanup: remove GLSL version checks 2017-05-17 10:46:42 +10:00			`in vec3 coords;`
			`out vec4 fragColor;`
Fix T47639: OpenGL render with smoke and fire incorrect when using transparency. The issue is that we are rendering to a 0..1 clamped sRGB buffer with unpremultiplied alpha, where the correct thing to do would be to render to an unclamped linear premultiplied alpha buffer. Then we would just make fire purely emissive without affecting the alpha channel at all, but that doesn't work here. So for now, draw fire and smoke separately using different shaders and blend modes, like it used to before the smoke programs were rewritten (see rB0372b642). 2016-08-28 16:50:49 +02:00
			`uniform sampler3D flame_texture;`
			`uniform sampler1D spectrum_texture;`

			`void main()`
			`{`
OpenGL: clean up smoke & fire shaders TODO: swap gl_Vertex for vec3 pos, update smoke setup code 2017-05-19 10:43:32 -04:00			`float flame = texture(flame_texture, coords).r;`
			`vec4 emission = texture(spectrum_texture, flame);`
Fix T47639: OpenGL render with smoke and fire incorrect when using transparency. The issue is that we are rendering to a 0..1 clamped sRGB buffer with unpremultiplied alpha, where the correct thing to do would be to render to an unclamped linear premultiplied alpha buffer. Then we would just make fire purely emissive without affecting the alpha channel at all, but that doesn't work here. So for now, draw fire and smoke separately using different shaders and blend modes, like it used to before the smoke programs were rewritten (see rB0372b642). 2016-08-28 16:50:49 +02:00
OpenGL: clean up smoke & fire shaders TODO: swap gl_Vertex for vec3 pos, update smoke setup code 2017-05-19 10:43:32 -04:00			`fragColor.rgb = emission.a * emission.rgb;`
			`fragColor.a = emission.a;`
Fix T47639: OpenGL render with smoke and fire incorrect when using transparency. The issue is that we are rendering to a 0..1 clamped sRGB buffer with unpremultiplied alpha, where the correct thing to do would be to render to an unclamped linear premultiplied alpha buffer. Then we would just make fire purely emissive without affecting the alpha channel at all, but that doesn't work here. So for now, draw fire and smoke separately using different shaders and blend modes, like it used to before the smoke programs were rewritten (see rB0372b642). 2016-08-28 16:50:49 +02:00			`}`