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playcanvas

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PlayCanvas WebGL game engine

playcanvas.com

playcanvas/engine

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declare const _default: "\nfn unpack3NFloats(src: f32) -> vec3f {\n let r = fract(src);\n let g = fract(src * 256.0);\n let b = fract(src * 65536.0);\n return vec3f(r, g, b);\n}\n\nfn saturate(x: f32) -> f32 {\n return clamp(x, 0.0, 1.0);\n}\n\nstruct TexLerpUnpackResult {\n result: vec4f,\n unpacked: vec3f\n}\n\nfn tex1Dlod_lerp_simple(tex: texture_2d<f32>, texSampler: sampler, tc: vec2f) -> vec4f {\n let tc_next = tc + vec2f(uniform.graphSampleSize);\n return mix( textureSample(tex, texSampler, tc), textureSample(tex, texSampler, tc_next), fract(tc.x * uniform.graphNumSamples) );\n}\n\nfn tex1Dlod_lerp_unpack(tex: texture_2d<f32>, texSampler: sampler, tc: vec2f) -> TexLerpUnpackResult {\n let tc_next = tc + vec2f(uniform.graphSampleSize);\n let a = textureSampleLevel(tex, texSampler, tc, 0.0);\n let b = textureSampleLevel(tex, texSampler, tc_next, 0.0);\n let c = fract(tc.x * uniform.graphNumSamples);\n let unpackedA = unpack3NFloats(a.w);\n let unpackedB = unpack3NFloats(b.w);\n let w_out = mix(unpackedA, unpackedB, c);\n return TexLerpUnpackResult(mix(a, b, c), w_out);\n}\n\nstruct RotateResult {\n rotatedVec: vec2f,\n matrix: mat2x2f\n}\n\nfn rotateWithMatrix(quadXY: vec2f, pRotation: f32) -> RotateResult {\n let c = cos(pRotation);\n let s = sin(pRotation);\n let m = mat2x2f(vec2f(c, s), vec2f(-s, c));\n return RotateResult(m * quadXY, m);\n}\n\nfn billboard(InstanceCoords: vec3f, quadXY: vec2f) -> vec3f {\n var pos: vec3f;\n #ifdef SCREEN_SPACE\n pos = vec3f(-1.0, 0.0, 0.0) * quadXY.x + vec3f(0.0, -1.0, 0.0) * quadXY.y;\n #else\n pos = -uniform.matrix_viewInverse[0].xyz * quadXY.x + -uniform.matrix_viewInverse[1].xyz * quadXY.y;\n #endif\n return pos;\n}\n\nfn customFace(InstanceCoords: vec3f, quadXY: vec2f) -> vec3f {\n let pos = uniform.faceTangent * quadXY.x + uniform.faceBinorm * quadXY.y;\n return pos;\n}\n\nfn safeNormalize(v: vec2f) -> vec2f {\n let l = length(v);\n return select(v, v / l, l > 1e-06);\n}\n\n@vertex\nfn vertexMain(input: VertexInput) -> VertexOutput {\n var output: VertexOutput;\n\n let meshLocalPos_in = input.particle_vertexData.xyz;\n let id = floor(input.particle_vertexData.w);\n\n let rndFactor = fract(sin(id + 1.0 + uniform.seed));\n let rndFactor3 = vec3f(rndFactor, fract(rndFactor*10.0), fract(rndFactor*100.0));\n\n let uv = id / uniform.numParticlesPot;\n readInput(uv);\n\n #ifdef LOCAL_SPACE\n let modelRotation = mat3x3f(uniform.matrix_model[0].xyz, uniform.matrix_model[1].xyz, uniform.matrix_model[2].xyz);\n inVel = modelRotation * inVel;\n #endif\n let viewRotation = mat3x3f(uniform.matrix_view[0].xyz, uniform.matrix_view[1].xyz, uniform.matrix_view[2].xyz);\n let velocityV = safeNormalize((viewRotation * inVel).xy);\n\n let particleLifetime = uniform.lifetime;\n\n var meshLocalPos = meshLocalPos_in;\n if (inLife <= 0.0 || inLife > particleLifetime || !inShow) {\n meshLocalPos = vec3f(0.0);\n }\n let quadXY = meshLocalPos.xy;\n let nlife = clamp(inLife / particleLifetime, 0.0, 1.0);\n\n let lerp_result = tex1Dlod_lerp_unpack(internalTex2, internalTex2Sampler, vec2f(nlife, 0.0));\n let params = lerp_result.result;\n let paramDiv = lerp_result.unpacked;\n\n var scale = params.y;\n let scaleDiv = paramDiv.x;\n let alphaDiv = paramDiv.z;\n\n scale = scale + (scaleDiv * 2.0 - 1.0) * uniform.scaleDivMult * fract(rndFactor*10000.0);\n\n #ifndef USE_MESH\n output.texCoordsAlphaLife = vec4f(quadXY * -0.5 + 0.5, (alphaDiv * 2.0 - 1.0) * uniform.alphaDivMult * fract(rndFactor*1000.0), nlife);\n #else\n output.texCoordsAlphaLife = vec4f(particle_uv, (alphaDiv * 2.0 - 1.0) * uniform.alphaDivMult * fract(rndFactor*1000.0), nlife);\n #endif\n\n var particlePos = inPos;\n var particlePosMoved = vec3f(0.0);\n\n var rotMatrix: mat2x2f;\n"; export default _default;