diff options
Diffstat (limited to '3rdparty/bgfx/examples/28-wireframe/fs_wf_mesh.sc')
-rw-r--r-- | 3rdparty/bgfx/examples/28-wireframe/fs_wf_mesh.sc | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/3rdparty/bgfx/examples/28-wireframe/fs_wf_mesh.sc b/3rdparty/bgfx/examples/28-wireframe/fs_wf_mesh.sc new file mode 100644 index 00000000000..4a68b1472e1 --- /dev/null +++ b/3rdparty/bgfx/examples/28-wireframe/fs_wf_mesh.sc @@ -0,0 +1,78 @@ +$input v_view, v_bc, v_normal + +/* + * Copyright 2016 Dario Manesku. All rights reserved. + * License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause + */ + +#include "../common/common.sh" +#include "uniforms.sh" + +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); + vec3 col = evalSh(nn); + + if (0.0 != u_drawEdges) + { + vec3 wfColor = u_wfColor; + float wfOpacity = u_wfOpacity; + float thickness = u_wfThickness; + + vec3 fw = abs(dFdx(v_bc)) + abs(dFdy(v_bc)); + vec3 val = smoothstep(vec3_splat(0.0), fw*thickness, v_bc); + float edge = min(min(val.x, val.y), val.z); // Gets to 0.0 when close to edges. + + vec3 edgeCol = mix(col, wfColor, wfOpacity); + col = mix(edgeCol, col, edge); + } + + gl_FragColor.xyz = col; + gl_FragColor.w = 1.0; +} |