omar/panopainter
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix brush projection to eliminate seams, still problems with big brushes and need to implement erase

Browse Source
This commit is contained in:
omigamedev
2017-08-13 16:59:58 +01:00
parent 060e08a891
commit 90ee185dcd
7 changed files with 123 additions and 90 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
engine/app_shaders.cpp
View File

@@ -205,9 +205,11 @@ void App::initShaders()
"in vec4 pos;\n"
"in vec2 uvs;\n"
"out vec2 uv;\n"
"out float q;\n"
"void main(){\n"
" uv = uvs;\n"
" gl_Position = mvp * vec4(pos.xyz, 1.0);\n"
" q = pos.z;\n"
" gl_Position = mvp * vec4(pos.xy, 0.0, 1.0);\n"
"}\n";
static const char* shader_stroke_f =
SHADER_VERSION
@@ -220,6 +222,7 @@ void App::initShaders()
"uniform mediump vec2 resolution;\n"
"uniform mediump float alpha;\n"
"in mediump vec2 uv;\n"
"in mediump float q;\n"
#ifdef __IOS__
"inout mediump vec4 frag;\n"
#else
@@ -227,7 +230,7 @@ void App::initShaders()
#endif
"void main(){\n"
" mediump vec2 uv2 = gl_FragCoord.st / resolution;\n"
" mediump float brush_alpha = ( 1.0 - texture(tex, uv).r ) * alpha;\n"
" mediump float brush_alpha = ( 1.0 - texture(tex, uv/q).r ) * alpha;\n"
" mediump vec4 fg = vec4(col.rgb, brush_alpha);\n"
#ifdef __IOS__
" mediump vec4 bg = frag;\n"