mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-11-25 09:08:22 -05:00
27 lines
No EOL
799 B
Python
27 lines
No EOL
799 B
Python
$input v_color0, v_texcoord0
|
|
|
|
#include "../../common/common.sh"
|
|
|
|
SAMPLERCUBE(u_texColor, 0);
|
|
|
|
uniform float u_inverse_gamma;
|
|
|
|
void main()
|
|
{
|
|
vec4 color = textureCube(u_texColor, v_texcoord0.xyz);
|
|
int index = int(v_texcoord0.w*4.0 + 0.5);
|
|
float distance = color.bgra[index];
|
|
|
|
float dx = length(dFdx(v_texcoord0.xyz));
|
|
float dy = length(dFdy(v_texcoord0.xyz));
|
|
float w = 16.0*0.5*(dx+dy);
|
|
|
|
// alternatives that seems to give identical results
|
|
//float w = 16.0*max(dx,dy);
|
|
//float w = 16.0*length(vec2(dx,dy))/sqrt(2.0);
|
|
//float w = 16.0*length(fwidth(v_texcoord0.xyz))/sqrt(2.0);
|
|
|
|
float a = smoothstep(0.5-w, 0.5+w, distance);
|
|
//a = pow(a, u_inverse_gamma); //I'll deal with gamma later
|
|
gl_FragColor = vec4(v_color0.rgb, v_color0.a*a);
|
|
} |