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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
25 lines
1.1 KiB
C++
25 lines
1.1 KiB
C++
#pragma once
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// .ksky: a sky for the renderer, compiled by assetc from an equirectangular .hdr.
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// KskyHeader
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// `levels` images of width >> k × height >> k RGBM8 pixels (rows top-down), largest first
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// Directions are world space (+Z up): u = atan2(d.y, d.x) / 2π + 0.5, v = acos(d.z) / π.
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// A pixel's linear radiance is rgb · a · kSkyRange. The sky is normalised so its upper half
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// averages 1 (the engine scales it by the map's sky intensity), and the sun is taken out of
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// it (the engine draws its own, matching the shadows). Level k is the sky as a surface of
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// roughness k / (levels - 1) reflects it (GGX prefiltered), for image-based reflections.
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#include <cstdint>
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namespace keel {
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inline constexpr uint32_t kKskyVersion = 1;
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inline constexpr float kSkyRange = 16.0f;
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struct KskyHeader {
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char magic[4]; // "KSKY"
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uint32_t version;
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uint32_t width, height, levels;
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float sunDir[3]; // towards where the sun was in the photo
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float sh[27]; // 9 RGB spherical harmonics of the light it casts: Σ shᵢ·Yᵢ(n) = irradiance / π
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};
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} // namespace keel
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