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Add wall drawing capability (for shadows)

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justin
2021-02-22 02:32:00 +01:00
parent 3dc566b6af
commit c75cda639b
7 changed files with 97 additions and 14 deletions
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shader/wallShadow.geom
+6 -7
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@@ -9,17 +9,16 @@ void main()
{
vec2 posa = gl_in[0].gl_Position.xy;
vec2 posb = gl_in[0].gl_Position.zw;
vec2 v = normalize( posb - posa);
vec2 off = vec2( -(v.y *0.2)
, v.x *0.2 );
vec2 posc = vBackPoss[0].xy;
vec2 posd = vBackPoss[0].zw;
gl_Position = vec4 (posa, 0 , 1);
gl_Position = vec4 (posa, -1 , 1);
EmitVertex();
gl_Position = vec4 (posb, 0 , 1);
gl_Position = vec4 (posb, -1 , 1);
EmitVertex();
gl_Position = vec4 (posa + off, 0 , 1);
gl_Position = vec4 (posc, -1 , 1);
EmitVertex();
gl_Position = vec4 (posb + off, 0 , 1);
gl_Position = vec4 (posd, -1 , 1);
EmitVertex();
EndPrimitive();