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https://github.com/Nexoniarz/Fry3DX.git
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f3e8eca87b
Shapes with live settings, shape editing, knife and hole tools, drawing shapes onto other objects, combining objects (add / subtract / overlap), copies, thickness, painting with stickers and layers, a Layout tab, a Print tab with checks, packed .fry files with autosave, export to GLB, glTF, FBX, OBJ, 3MF, STL and PLY, folders in Layers, its own crash screen, and a website for GitHub Pages in docs/. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NMSrd5oe1GpUD7E6d825KP
32 lines
1.4 KiB
GLSL
32 lines
1.4 KiB
GLSL
#version 460
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// Eye adaptation (1×1): the scene's average brightness (geometric mean of 16 taps of the
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// smallest bloom level), turned into an exposure that keeps a mid grey where it should be,
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// eased towards (0.6x to 1.8x, so nothing burns out) from last frame's at `speed` per second (faster into the dark is slower,
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// as eyes are). The tonemap multiplies its exposure by it.
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#define KEEL_POST // screen-space: render targets, sampled clamped
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#include "backend.glsl"
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PUSH_BLOCK {
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uint src; // the smallest bloom level
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uint prev; // last frame's (0 = start fresh)
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float dt;
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float speed;
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float key; // the brightness to aim for
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float minE, maxE;
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float pad;
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} pc;
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layout(location = 0) out vec4 o_exposure;
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void main() {
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float sum = 0.0;
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for (int y = 0; y < 4; ++y)
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for (int x = 0; x < 4; ++x) {
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vec3 c = sampleTexLod(pc.src, (vec2(x, y) + 0.5) / 4.0, 0.0).rgb;
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sum += log(max(dot(c, vec3(0.2126, 0.7152, 0.0722)), 1e-4));
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}
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float average = exp(sum / 16.0);
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float target = clamp(pc.key / average, pc.minE, pc.maxE);
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if (pc.prev == 0u) { o_exposure = vec4(target); return; }
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float last = sampleTexLod(pc.prev, vec2(0.5), 0.0).r;
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float rate = target > last ? pc.speed * 0.6 : pc.speed; // brightening (into the dark) is slower
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o_exposure = vec4(last + (target - last) * (1.0 - exp(-pc.dt * rate)));
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}
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