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Fade screen-space reflection towards inner margin

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- Fade reflection towards inner margin and clip it at screen edges instead of external margin.
- Round edges of the fade margin if both are being cut off to prevent sharp corners.
This commit is contained in:
Arman 2020-09-08 15:29:36 -07:00
parent 8c5ed68847
commit cf7bb2c51f
1 changed files with 6 additions and 5 deletions
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11
drivers/gles3/shaders/screen_space_reflection.glsl
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@ -175,16 +175,17 @@ void main() {
float margin_blend = 1.0;
vec2 margin = vec2((viewport_size.x + viewport_size.y) * 0.5 * 0.05); // make a uniform margin
if (any(bvec4(lessThan(pos, -margin), greaterThan(pos, viewport_size + margin)))) {
// clip outside screen + margin
if (any(bvec4(lessThan(pos, vec2(0.0, 0.0)), greaterThan(pos, viewport_size * 0.5)))) {
// clip at the screen edges
frag_color = vec4(0.0);
return;
}
{
//blend fading out towards external margin
vec2 margin_grad = mix(pos - viewport_size, -pos, lessThan(pos, vec2(0.0)));
margin_blend = 1.0 - smoothstep(0.0, margin.x, max(margin_grad.x, margin_grad.y));
//blend fading out towards inner margin
// 0.25 = midpoint of half-resolution reflection
vec2 margin_grad = mix(viewport_size * 0.5 - pos, pos, lessThan(pos, viewport_size * 0.25));
margin_blend = smoothstep(0.0, margin.x * margin.y, margin_grad.x * margin_grad.y);
//margin_blend = 1.0;
}