mirror of
https://github.com/X0nk/Bliss-Shader.git
synced 2026-10-10 05:03:04 +08:00
Xonk
49 lines
1.6 KiB
GLSL
49 lines
1.6 KiB
GLSL
uniform vec3 lightningEffect;
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#ifdef IS_IRIS
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uniform vec4 lightningBoltPosition;
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#else
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vec4 lightningBoltPosition = vec4(0.0, 100.0, 0.0, lightningEffect.x);
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#endif
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vec3 createLightningPointLight(
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vec3 playerPos, vec3 lightningBoltPos
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#if defined LIGHTNINGFLASH_DIFFUSE
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, vec3 normal
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#endif
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#if defined LIGHTNINGFLASH_VL
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,float cloudDensity
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,float gradient
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#endif
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){
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if(lightningBoltPosition.w > 0.0){
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// make it only get 5x brighter than 1.0 as that is default emissive brightness.
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vec3 flashColor = lightningEffect.rgb * 1.0;
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// flashy flashy
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flashColor *= (sin(lightningEffect.r*10.0)*0.5+0.5)*0.8+0.2;
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vec3 boltPos = playerPos - lightningBoltPos;
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// stretch the vertical component to cover the upper part of the bolt.
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vec3 boltPos_stretched = playerPos - vec3(lightningBoltPos.x, clamp(playerPos.y, lightningBoltPos.y, lightningBoltPos.y+150.0), lightningBoltPos.z);
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float flashDistance = length(boltPos_stretched);
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#if defined LIGHTNINGFLASH_DIFFUSE
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// lerp between 2 points for ndotl, for the lower and upper part of the bolt.
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float NdotL = clamp(dot(normalize(boltPos - vec3(0,10,0)), -normal), 0, 1);
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float NdotL2 = clamp(dot(normalize(boltPos - vec3(0,100,0)), -normal),0,1);
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flashColor *= NdotL * (1.0 - NdotL2) + NdotL2;
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flashColor *= exp(sqrt(flashDistance) * -0.5) * 15.0 * 3.0 * clamp(1.0-flashDistance/500.,0,1);
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#endif
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#if defined LIGHTNINGFLASH_VL
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flashColor *= (1.0-exp(-3.0*cloudDensity)) * exp(-3.0*(1.0-gradient));
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flashColor *= exp(sqrt(flashDistance) * -0.5) * 15.0 * clamp(1.0-flashDistance/500.,0,1);
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#endif
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return flashColor;
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}else return vec3(0.0);
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} |