diff options
Diffstat (limited to '3rdparty/bgfx/tools/geometryv/fs_mesh.sc')
-rw-r--r-- | 3rdparty/bgfx/tools/geometryv/fs_mesh.sc | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/3rdparty/bgfx/tools/geometryv/fs_mesh.sc b/3rdparty/bgfx/tools/geometryv/fs_mesh.sc new file mode 100644 index 00000000000..67f5d248d11 --- /dev/null +++ b/3rdparty/bgfx/tools/geometryv/fs_mesh.sc @@ -0,0 +1,64 @@ +$input v_normal + +/* + * Copyright 2019 Attila Kocsis. All rights reserved. + * License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause + */ + +#include <bgfx_shader.sh> + + +// this is from 28-wireframe/fs_wf_mesh.sc by Dario Manesku +vec3 evalSh(vec3 _dir) +{ +# define k01 0.2820947918 // sqrt( 1/PI)/2 +# define k02 0.4886025119 // sqrt( 3/PI)/2 +# define k03 1.0925484306 // sqrt(15/PI)/2 +# define k04 0.3153915652 // sqrt( 5/PI)/4 +# define k05 0.5462742153 // sqrt(15/PI)/4 + + vec3 shEnv[9]; + shEnv[0] = vec3( 0.967757057878229854, 0.976516067990363390, 0.891218272348969998); /* Band 0 */ + shEnv[1] = vec3(-0.384163503608655643, -0.423492289131209787, -0.425532726148547868); /* Band 1 */ + shEnv[2] = vec3( 0.055906294587354334, 0.056627436881069373, 0.069969936396987467); + shEnv[3] = vec3( 0.120985157386215209, 0.119297994074027414, 0.117111965829213599); + shEnv[4] = vec3(-0.176711633774331106, -0.170331404095516392, -0.151345020570876621); /* Band 2 */ + shEnv[5] = vec3(-0.124682114349692147, -0.119340785411183953, -0.096300354204368860); + shEnv[6] = vec3( 0.001852378550138503, -0.032592784164597745, -0.088204495001329680); + shEnv[7] = vec3( 0.296365482782109446, 0.281268696656263029, 0.243328223888495510); + shEnv[8] = vec3(-0.079826665303240341, -0.109340956251195970, -0.157208859664677764); + + vec3 nn = _dir.zxy; + + float sh[9]; + sh[0] = k01; + sh[1] = -k02*nn.y; + sh[2] = k02*nn.z; + sh[3] = -k02*nn.x; + sh[4] = k03*nn.y*nn.x; + sh[5] = -k03*nn.y*nn.z; + sh[6] = k04*(3.0*nn.z*nn.z-1.0); + sh[7] = -k03*nn.x*nn.z; + sh[8] = k05*(nn.x*nn.x-nn.y*nn.y); + + vec3 rgb = vec3_splat(0.0); + rgb += shEnv[0] * sh[0] * 1.0; + rgb += shEnv[1] * sh[1] * 2.0/2.5; + rgb += shEnv[2] * sh[2] * 2.0/2.5; + rgb += shEnv[3] * sh[3] * 2.0/2.5; + rgb += shEnv[4] * sh[4] * 1.0/2.5; + rgb += shEnv[5] * sh[5] * 0.5; + rgb += shEnv[6] * sh[6] * 0.5; + rgb += shEnv[7] * sh[7] * 0.5; + rgb += shEnv[8] * sh[8] * 0.5; + + return rgb; +} + +void main() +{ + vec3 nn = normalize(v_normal); + + gl_FragColor.xyz = evalSh(nn); + gl_FragColor.w = 1.0; +} |