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更真实的3D方块

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This commit is contained in:
MrZ626
2021-02-09 16:13:19 +08:00
parent 5fea32203a
commit cab826ba34
11 changed files with 117 additions and 77 deletions
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18
Zframework/light/lightRender.glsl
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@@ -4,9 +4,9 @@ extern float xresolution;
float samp(vec2 coord,float r,Image u_texture){
return step(r,Texel(u_texture,coord).r);
}
vec4 effect(vec4 color,Image texture,vec2 texture_coords,vec2 screen_coords){
vec4 effect(vec4 color,Image tex,vec2 tex_coords,vec2 screen_coords){
// Cartesian to polar, y of 1D sample is always 0
vec2 norm=texture_coords.st*2.-1.;
vec2 norm=tex_coords.st*2.-1.;
vec2 tc=vec2((atan(norm.y,norm.x)+PI)/(2.*PI),0.);
float r=length(norm);
@@ -15,14 +15,14 @@ vec4 effect(vec4 color,Image texture,vec2 texture_coords,vec2 screen_coords){
// Simple Gaussian blur
float sum=// Brightness(0~1)
samp(vec2(tc.x-3.*blur,tc.y),r,texture)*0.1
+samp(vec2(tc.x-2.*blur,tc.y),r,texture)*0.13
+samp(vec2(tc.x-1.*blur,tc.y),r,texture)*0.17
samp(vec2(tc.x-3.*blur,tc.y),r,tex)*0.1
+samp(vec2(tc.x-2.*blur,tc.y),r,tex)*0.13
+samp(vec2(tc.x-1.*blur,tc.y),r,tex)*0.17
+samp(tc,r,texture)*0.2// The center tex coord, which gives us hard shadows.
+samp(vec2(tc.x+1.*blur,tc.y),r,texture)*0.17
+samp(vec2(tc.x+2.*blur,tc.y),r,texture)*0.13
+samp(vec2(tc.x+3.*blur,tc.y),r,texture)*0.1;
+samp(tc,r,tex)*0.2// The center tex coord, which gives us hard shadows.
+samp(vec2(tc.x+1.*blur,tc.y),r,tex)*0.17
+samp(vec2(tc.x+2.*blur,tc.y),r,tex)*0.13
+samp(vec2(tc.x+3.*blur,tc.y),r,tex)*0.1;
// Multiply the distance to get a soft fading
return vec4(vec3(1.),sum*smoothstep(1.,0.,r));