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Continue work on shadow rendering

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justin
2023-03-14 11:20:38 +00:00
parent 9947979b52
commit 6af041bb8c
20 changed files with 417 additions and 380 deletions
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shader/lighting/wallShadow.geom
+60 -60
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@@ -1,68 +1,68 @@
#version 450 core
layout (points) in;
layout (triangle_strip, max_vertices = 8) out;
layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
layout(points) in;
layout(triangle_strip, max_vertices = 18) out;
layout(std140, binding = 0) uniform TheMat { mat4 theMat; };
uniform vec3 lightPos;
vec4 shift (vec4 p)
{ return vec4 (p.xy + (200 * (p.xy-lightPos.xy)), 0 , 1);
uniform float rad;
float rad2 = rad;
// Preprocessed to include ../functions.glsl
float closestPointOnLineParam (vec2 a, vec2 b, vec2 p) {
return dot(p - a,b-a) / dot(b-a,b-a);
}
float isLHS (vec2 startV, vec2 testV)
{
return sign( -startV.x * testV.y + startV.y * testV.x);
vec2 closestPointOnSeg (vec2 a,vec2 b, vec2 p) {
float x = closestPointOnLineParam(a,b,p);
if (x < 0) {
return a;
} else{ if (x > 1) { return b; }
{ return a + (x * (b- a));}
}
}
// End include 2023-03-13 15:33:44.438312149 UTC
vec2 shift(vec2 p) {
return vec2(lightPos.xy + (rad2 * normalize(p - lightPos.xy)));
}
float isLHS(vec2 startV, vec2 testV) {
return sign(-startV.x * testV.y + startV.y * testV.x);
}
// construct a box with openings on bottom face and face away from wall
void main()
{
vec4 p1 = vec4 (gl_in[0].gl_Position.xy,0,1);
vec4 p2 = vec4 (gl_in[0].gl_Position.zw,0,1);
if (isLHS (p1.xy - lightPos.xy, p2.xy - lightPos.xy) < 0)
{
vec4 p3 = vec4 (p1.xy,100,1);
vec4 p4 = vec4 (p2.xy,100,1);
vec4 p5 = shift(p1);
vec4 p6 = shift(p2);
vec4 p7 = vec4 (p6.xy,100,1);
vec4 p8 = vec4 (p5.xy,100,1);
void main() {
vec2 p1 = gl_in[0].gl_Position.xy;
vec2 p2 = gl_in[0].gl_Position.zw;
vec2 closepoint = closestPointOnSeg(p1,p2,lightPos.xy);
if (isLHS(p1 - lightPos.xy, p2 - lightPos.xy) < 0 && distance(closepoint,lightPos.xy) < rad2) {
vec2 closeshift = (rad2 * normalize(closepoint - lightPos.xy)) + lightPos.xy - closepoint;
vec2 p1cs = p1 + closeshift;
vec2 p1o = vec2( distance(p1,lightPos.xy) > rad2 ? p1cs : shift(p1) );
vec2 p2cs = p2 + closeshift;
vec2 p2o = vec2( distance(p2,lightPos.xy) > rad2 ? p2cs : shift(p2) );
vec4 a1 = theMat * p1;
vec4 a2 = theMat * p2;
vec4 a3 = theMat * p3;
vec4 a4 = theMat * p4;
vec4 a5 = theMat * p5;
vec4 a6 = theMat * p6;
vec4 a7 = theMat * p7;
vec4 a8 = theMat * p8;
gl_Position = theMat * vec4(p1o,0,1); EmitVertex();
gl_Position = theMat * vec4(p1,0,1); EmitVertex();
gl_Position = theMat * vec4(p1o,100,1); EmitVertex();
gl_Position = theMat * vec4(p1,100,1); EmitVertex();
gl_Position = theMat * vec4(p1cs,100,1); EmitVertex();
gl_Position = theMat * vec4(p2,100,1); EmitVertex();
gl_Position = theMat * vec4(p2cs,100,1); EmitVertex();
gl_Position = theMat * vec4(p2o,100,1); EmitVertex();
EndPrimitive();
//gl_Position = a4; EmitVertex();
//gl_Position = a3; EmitVertex();
//gl_Position = a7; EmitVertex();
//gl_Position = a8; EmitVertex();
//gl_Position = a5; EmitVertex();
//gl_Position = a3; EmitVertex();
//gl_Position = a1; EmitVertex();
//gl_Position = a4; EmitVertex();
//gl_Position = a2; EmitVertex();
//gl_Position = a7; EmitVertex();
//gl_Position = a6; EmitVertex();
gl_Position = a1; EmitVertex();
gl_Position = a5; EmitVertex();
gl_Position = a3; EmitVertex();
gl_Position = a8; EmitVertex();
gl_Position = a4; EmitVertex();
gl_Position = a7; EmitVertex();
gl_Position = a2; EmitVertex();
gl_Position = a6; EmitVertex();
//gl_Position = a5; EmitVertex();
//gl_Position = a1; EmitVertex();
//gl_Position = a8; EmitVertex();
//gl_Position = a3; EmitVertex();
//gl_Position = a7; EmitVertex();
//gl_Position = a4; EmitVertex();
//gl_Position = a6; EmitVertex();
//gl_Position = a2; EmitVertex();
EndPrimitive();
} else {}
// gl_Position = theMat * vec4(p2o,100,1); EmitVertex();
// gl_Position = theMat * vec4(p2,100,1); EmitVertex();
// gl_Position = theMat * vec4(p2o,0,1); EmitVertex();
// gl_Position = theMat * vec4(p2,0,1); EmitVertex();
gl_Position = theMat * vec4(p2,100,1); EmitVertex();
gl_Position = theMat * vec4(p2,0,1); EmitVertex();
gl_Position = theMat * vec4(p2o,100,1); EmitVertex();
gl_Position = theMat * vec4(p2o,0,1); EmitVertex();
gl_Position = theMat * vec4(p2cs,100,1); EmitVertex();
gl_Position = theMat * vec4(p2cs,0,1); EmitVertex();
gl_Position = theMat * vec4(p1cs,100,1); EmitVertex();
gl_Position = theMat * vec4(p1cs,0,1); EmitVertex();
gl_Position = theMat * vec4(p1o,100,1); EmitVertex();
gl_Position = theMat * vec4(p1o,0,1); EmitVertex();
EndPrimitive();
} else {
}
}