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fix stroke noise, wet and stencil

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This commit is contained in:
omigamedev
2018-05-09 17:02:08 +02:00
parent dca25bf0f3
commit c4f304f7bc
3 changed files with 6 additions and 6 deletions
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6
engine/app_shaders.cpp
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@@ -327,7 +327,7 @@ void App::initShaders()
" mediump vec2 uv2 = gl_FragCoord.st / resolution;\n"
" mediump float stencil = 1.0 - (texture(tex_stencil, (uv2+stencil_offset) * 2.0).r * 0.9) * stencil_alpha;\n"
" mediump float brush_alpha = ( 1.0 - texture(tex, uv/q).r ) * alpha;\n"
" mediump vec4 fg = vec4(col.rgb, brush_alpha);\n"
" mediump vec4 fg = vec4(col.rgb, brush_alpha * stencil);\n"
#ifdef __IOS__
" mediump vec4 bg = frag;\n"
#else
@@ -335,10 +335,10 @@ void App::initShaders()
#endif
" fg.a *= 1.0-rand(uv2+uv)*noise;\n"
" if (fg.a == 0.0) discard;\n"
" mediump float contribution = (1.0 - bg.a) * fg.a * stencil;\n"
" mediump float contribution = (1.0 - bg.a) * fg.a;\n"
" mediump float alpha_tot = bg.a + contribution;"
" mediump vec3 rgb = mix(bg.rgb, fg.rgb, fg.a / alpha_tot);\n"
" mediump vec4 frag_wet = vec4(rgb, mix(bg.a, max(bg.a, fg.a * stencil), fg.a));\n"
" mediump vec4 frag_wet = vec4(rgb, max(bg.a, fg.a * 1.2));\n"
" mediump vec4 frag_dry = vec4(rgb, alpha_tot);\n"
" frag = mix(frag_dry, frag_wet, wet);\n"
"}\n";