62 lines
1.5 KiB
Python
62 lines
1.5 KiB
Python
|
$input v_texcoord0
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 2021 elven cache. All rights reserved.
|
||
|
|
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "../common/common.sh"
|
||
|
|
#include "parameters.sh"
|
||
|
|
#include "normal_encoding.sh"
|
||
|
|
|
||
|
|
SAMPLER2D(s_color, 0);
|
||
|
|
SAMPLER2D(s_normal, 1);
|
||
|
|
|
||
|
|
float ShadertoyNoise (vec2 uv) {
|
||
|
|
return fract(sin(dot(uv.xy, vec2(12.9898,78.233))) * 43758.5453123);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ModHelper (float a, float b)
|
||
|
|
{
|
||
|
|
return int( a - (b*floor(a/b)));
|
||
|
|
}
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
vec2 texCoord = v_texcoord0;
|
||
|
|
|
||
|
|
// mess with result so there's something to denosie
|
||
|
|
float sn = 1.0;
|
||
|
|
if (1.5 < u_noiseType)
|
||
|
|
{
|
||
|
|
sn = ShadertoyNoise(gl_FragCoord.xy + vec2(314.0, 159.0)*u_frameIdx);
|
||
|
|
sn = (sn < 0.5) ? 0.0 : 1.0;
|
||
|
|
}
|
||
|
|
else if (0.5 < u_noiseType)
|
||
|
|
{
|
||
|
|
// having trouble compiling for gles when using % or mod :(
|
||
|
|
int modCoordX = ModHelper(gl_FragCoord.x, 2.0);
|
||
|
|
int modCoordY = ModHelper(gl_FragCoord.y, 2.0);
|
||
|
|
int frameSelect = modCoordY * 2 + modCoordX;
|
||
|
|
int frameMod4 = ModHelper(u_frameIdx, 4.0);
|
||
|
|
sn = (frameSelect == frameMod4) ? 1.0 : 0.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
vec4 normalRoughness = texture2D(s_normal, texCoord).xyzw;
|
||
|
|
vec3 normal = NormalDecode(normalRoughness.xyz);
|
||
|
|
float roughness = 0.5;
|
||
|
|
|
||
|
|
// need to get a valid view vector for any microfacet stuff :(
|
||
|
|
float gloss = 1.0-roughness;
|
||
|
|
float specPower = 1022.0 * gloss + 2.0;
|
||
|
|
|
||
|
|
vec3 light = normalize(vec3(-0.2, 1.0, -0.2));
|
||
|
|
float NdotL = saturate(dot(normal, light));
|
||
|
|
float diff = NdotL*0.99 + 0.01;
|
||
|
|
float spec = 5.0 * pow(NdotL, specPower);
|
||
|
|
|
||
|
|
float lightAmt = (diff + spec) * sn;
|
||
|
|
|
||
|
|
gl_FragColor = vec4(vec3_splat(lightAmt), 1.0);
|
||
|
|
}
|