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https://git.dev.opencascade.org/repos/occt.git
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f423143109
Found via `codespell -q 3 -S "*.fr" -L aadd,abnd,abord,acount,adn,afile,aline,alo,alocation,alog,als,anc,ane,anid,anormal,anout,ans,anumber,aother,aparent,apoints,aprogram,asender,asign,asnd,ba,bbuild,bloc,bord,bu,caf,cas,childrens,childs,classe,clen,commun,cylindre,don,dout,dum,ede,entites,fo,fonction,guid,hist,identic,ii,indx,inout,invalide,ist,iterm,llength,lod,mape,modeling,methode,mye,myu,nam,nd,nin,normale,normales,ons,parametre,parametres,periode,pres,reste,resul,secont,serie,shs,slin,som,somme,syntaxe,sur,te,thei,theis,ther,theres,thes,thev,thex,thet,tol,transfert,va,vas,verifie,vertexes,weight`
60 lines
1.5 KiB
Plaintext
60 lines
1.5 KiB
Plaintext
puts "========"
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puts "0029074: Visualization, TKOpenGl - support Geometry Shader definition"
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puts "========"
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pload MODELING VISUALIZATION
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set aShaderVert "
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out vec4 VertColor;
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void main() {
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VertColor = occColor;
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gl_Position = occVertex;
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}"
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# define a Geometry shader drawing shrunken triangles
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set aShaderGeom "
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layout(triangles) in;
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layout(triangle_strip, max_vertices=3) out;
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in vec4 VertColor\[3\];
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out vec4 Color;
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void main() {
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mat4 aMat = occProjectionMatrix * occWorldViewMatrix * occModelWorldMatrix;
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vec3 aCenter = vec3 (0.0, 0.0, 0.0);
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for (int aTriVertIter = 0; aTriVertIter < 3; ++aTriVertIter) {
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aCenter += gl_in\[aTriVertIter\].gl_Position.xyz;
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}
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aCenter /= 3.0;
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for (int aTriVertIter = 0; aTriVertIter < 3; ++aTriVertIter) {
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vec3 aVec = gl_in\[aTriVertIter\].gl_Position.xyz - aCenter;
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vec3 aVertRes = aCenter + normalize (aVec) * length (aVec) * 0.75;
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gl_Position = aMat * vec4 (aVertRes, 1.0);
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Color = VertColor\[aTriVertIter\] * 2.0;
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EmitVertex();
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}
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EndPrimitive();
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}"
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set aShaderFrag "
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in vec4 Color;
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void main() {
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occFragColor = Color;
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}"
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# draw a box
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box b 1 2 3
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vcaps -core
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vclear
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vinit View1
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if { [string match "OpenGL ES 2.0*" [vglinfo VERSION]] || [string match "OpenGL ES 3.0*" [vglinfo VERSION]] } {
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puts "Skipping test case: OpenGL ES 3.2+ is required"
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return
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}
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vaxo
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vdisplay -dispMode 1 -mutable b
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vfit
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vrotate 0.2 0.0 0.0
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vdump $::imagedir/${::casename}_normal.png
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vshaderprog b -vert $aShaderVert -geom $aShaderGeom -frag $aShaderFrag
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vdump $::imagedir/${::casename}_geom.png
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