bb297bf84c
Created Lightning Gun effect (Uses LineRenderer, very slow) Created GPU Lightning renderer (very fast, still needs integration)
56 lines
1.3 KiB
Text
56 lines
1.3 KiB
Text
#pragma kernel CSMain
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#define NUM_THREAD_X 16
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struct Particle
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{
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float3 velocity;
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float3 pos;
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};
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float _Time;
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float _ForceRate;
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float _Damping;
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float _Gravity;
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float3 _Bounds;
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RWStructuredBuffer<Particle> _ParticleBuffer;
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RWStructuredBuffer<float3> _InputBuffer;
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float rand(float2 co){
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return frac(sin(dot(co.xy ,float2(12.9898,78.233))) * 43758.5453);
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}
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[numthreads(NUM_THREAD_X,1,1)]
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void CSMain (uint3 id : SV_DispatchThreadID)
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{
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uint idx = id.x;
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Particle particle = _ParticleBuffer[idx];
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float3 force = float3 (
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rand(float2(idx, _Time )) - 0.5,
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rand(float2(idx, _Time*2)) - 0.5,
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rand(float2(idx, _Time*3)) - 0.5
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);
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float3 velocity = particle.velocity * _Damping + force * _ForceRate;
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velocity.y -= _Gravity;
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float3 pos = particle.pos + velocity;
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float3 overPlus = pos - _Bounds;
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if ( overPlus.x > 0) { pos.x = _Bounds.x; velocity.x *= -0.95;}
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if ( overPlus.y > 0) { pos.y = _Bounds.y; velocity.y *= -0.95;}
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if ( overPlus.z > 0) { pos.z = _Bounds.z; velocity.z *= -0.95;}
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float3 overMinus = pos + _Bounds;
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if ( overMinus.x < 0){ pos.x = -_Bounds.x; velocity.x *= -0.95;}
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if ( overMinus.y < 0){ pos.y = -_Bounds.y; velocity.y *= -0.95;}
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if ( overMinus.z < 0){ pos.z = -_Bounds.z; velocity.z *= -0.95;}
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particle.pos = pos;
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particle.velocity = velocity;
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_ParticleBuffer[idx] = particle;
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_InputBuffer[idx] = particle.pos;
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}
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