mirror of
https://github.com/Kelsidavis/WoWee.git
synced 2026-03-23 15:50:20 +00:00
6563eebb60
- Skybox now uses DBC sky colors (skyTop/skyMiddle/skyBand1/skyBand2) instead of hardcoded C++ color curves, with 3-band gradient and Rayleigh/Mie scattering - Clouds receive sun direction for lit edges, self-shadowing, and silver lining - Fixed sun quad box artifact with proper edge fade in celestial shader - Lens flare attenuated by fog, cloud density, and weather intensity - Replaced garish green/purple lens flare ghosts with warm natural palette - Added zone-based weather system for single-player mode with per-zone rain/snow configuration, probability-based activation, and smooth intensity transitions - Server SMSG_WEATHER remains authoritative when connected to a server
97 lines
3.3 KiB
GLSL
97 lines
3.3 KiB
GLSL
#version 450
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layout(set = 0, binding = 0) uniform PerFrame {
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mat4 view;
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mat4 projection;
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mat4 lightSpaceMatrix;
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vec4 lightDir;
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vec4 lightColor;
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vec4 ambientColor;
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vec4 viewPos;
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vec4 fogColor;
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vec4 fogParams;
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vec4 shadowParams;
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};
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layout(push_constant) uniform Push {
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vec4 zenithColor; // DBC skyTopColor
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vec4 midColor; // DBC skyMiddleColor
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vec4 horizonColor; // DBC skyBand1Color
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vec4 fogColorPush; // DBC skyBand2Color
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vec4 sunDirAndTime; // xyz = sun direction, w = timeOfDay
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} push;
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layout(location = 0) in vec2 TexCoord;
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layout(location = 0) out vec4 outColor;
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void main() {
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// Reconstruct world-space ray direction from screen position.
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float ndcX = TexCoord.x * 2.0 - 1.0;
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float ndcY = -(TexCoord.y * 2.0 - 1.0);
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vec3 viewDir = vec3(ndcX / projection[0][0],
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ndcY / abs(projection[1][1]),
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-1.0);
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mat3 invViewRot = transpose(mat3(view));
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vec3 worldDir = normalize(invViewRot * viewDir);
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vec3 sunDir = push.sunDirAndTime.xyz;
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float timeOfDay = push.sunDirAndTime.w;
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// Elevation: +1 = zenith, 0 = horizon, -1 = nadir
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float elev = worldDir.z;
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float elevClamped = clamp(elev, 0.0, 1.0);
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// --- 3-band sky gradient using DBC colors ---
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// Zenith dominates upper sky, mid color fills the middle,
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// horizon band at the bottom with a thin fog fringe.
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vec3 sky;
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if (elevClamped > 0.4) {
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// Upper sky: mid -> zenith
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float t = (elevClamped - 0.4) / 0.6;
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sky = mix(push.midColor.rgb, push.zenithColor.rgb, t);
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} else if (elevClamped > 0.05) {
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// Lower sky: horizon -> mid (wide band)
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float t = (elevClamped - 0.05) / 0.35;
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sky = mix(push.horizonColor.rgb, push.midColor.rgb, t);
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} else {
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// Thin fog fringe right at horizon
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float t = elevClamped / 0.05;
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sky = mix(push.fogColorPush.rgb, push.horizonColor.rgb, t);
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}
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// --- Below-horizon darkening (nadir) ---
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if (elev < 0.0) {
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float nadirFade = clamp(-elev * 3.0, 0.0, 1.0);
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vec3 nadirColor = push.fogColorPush.rgb * 0.3;
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sky = mix(push.fogColorPush.rgb, nadirColor, nadirFade);
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}
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// --- Rayleigh-like scattering (subtle warm glow near sun) ---
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float sunDot = max(dot(worldDir, sunDir), 0.0);
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float sunAboveHorizon = clamp(sunDir.z, 0.0, 1.0);
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float rayleighStrength = pow(1.0 - elevClamped, 3.0) * 0.15;
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vec3 scatterColor = mix(vec3(0.8, 0.45, 0.15), vec3(0.3, 0.5, 1.0), elevClamped);
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sky += scatterColor * rayleighStrength * sunDot * sunAboveHorizon;
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// --- Mie-like forward scatter (sun disk glow) ---
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float mieSharp = pow(sunDot, 64.0) * 0.4;
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float mieSoft = pow(sunDot, 8.0) * 0.1;
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vec3 sunGlowColor = mix(vec3(1.0, 0.85, 0.55), vec3(1.0, 1.0, 0.95), elevClamped);
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sky += sunGlowColor * (mieSharp + mieSoft) * sunAboveHorizon;
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// --- Subtle horizon haze ---
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float hazeDensity = exp(-elevClamped * 12.0) * 0.06;
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sky += push.horizonColor.rgb * hazeDensity * sunAboveHorizon;
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// --- Night: slight moonlight tint ---
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if (sunDir.z < 0.0) {
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float moonlight = clamp(-sunDir.z * 0.5, 0.0, 0.15);
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sky += vec3(0.02, 0.03, 0.08) * moonlight;
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}
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outColor = vec4(sky, 1.0);
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}
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