class GpuParticle

package h3d.shader

extends Shader

@:directlyUsed@:src({ @:import h3d.shader.BaseMesh; @input var props:{ var uv : Vec2; var time : Float; var life : Float; var init : Vec2; var delta : Vec2}; @param var fadeIn:Float; @param var fadeOut:Float; @param var fadePower:Float; @param var speedIncr:Float; @param var gravity:Float; @param var color:Sampler2D; @param var texture:Sampler2D; @param var time:Float; @param var maxTime:Float; @param var loopCounter:Float; @param var animationRepeat:Float; @param var animationFixedFrame:Float; @param var totalFrames:Float; @param var frameSize:Vec2; @param var frameDivision:Vec3; @param var transform:Mat3x4; @const var clipBounds:Bool; @param var volumeMin:Vec3; @param var volumeSize:Vec3; @param var offset:Vec3; @param var cameraRotation:Mat3; @const var transform3D:Bool; var t:Float; var normT:Float; var randProp:Float; var frame:Float; var frameBlending:Float; var calculatedUV:Vec2; var colorUV:Vec2; var frameUV:Vec2; var frameUV2:Vec2; var visibility:Float; function __init__() { { var totTime = props.time + time; t = totTime % (props.life * loopCounter); visibility = float(totTime >= 0) * float(totTime - t < props.time + maxTime); }; normT = t / props.life; randProp = -props.time / props.life; transformedPosition = relativePosition + (input.normal * (1 + speedIncr * t)) * t + offset; if (clipBounds) transformedPosition = (transformedPosition - volumeMin) % volumeSize + volumeMin; transformedPosition *= transform; transformedPosition.z -= gravity * t * t; transformedNormal = camera.dir; calculatedUV = vec2(props.uv.x, 1 - props.uv.y); { frame = (t / props.life) * animationRepeat + float(int(animationFixedFrame * randProp)); frameBlending = frame.fract(); frame -= frameBlending; frame %= totalFrames; var nextFrame = (frame + 1) % totalFrames; var delta = vec2(frame % frameDivision.x, float(int(frame / frameDivision.x))); frameUV = (calculatedUV + delta) * frameDivision.yz; var delta = vec2(nextFrame % frameDivision.x, float(int(nextFrame / frameDivision.x))); frameUV2 = (calculatedUV + delta) * frameDivision.yz; }; }; function vertex() { var current = props.init + props.delta * t; var size = (props.uv - 0.5) * current.y.max(0.); var rot = current.x; var crot = cos(rot), srot = sin(rot); var screenRatio = vec2(global.pixelSize.x / global.pixelSize.y, 1); var dist = vec2(size.x * crot - size.y * srot, size.x * srot + size.y * crot); if (transform3D) { transformedPosition += vec3(0., dist.x, dist.y) * cameraRotation; projectedPosition = vec4(transformedPosition, 1) * camera.viewProj; } else { projectedPosition = vec4(transformedPosition, 1) * camera.viewProj; projectedPosition.xy += dist * screenRatio; }; projectedPosition *= visibility; if (normT < fadeIn) pixelColor.a *= (normT / fadeIn).pow(fadePower) else if (normT > fadeOut) pixelColor.a *= ((1 - normT) / (1 - fadeOut)).pow(fadePower); colorUV = vec2(normT, randProp); }; function fragment() { pixelColor *= color.get(colorUV); pixelColor *= mix(texture.get(frameUV), texture.get(frameUV2), frameBlending); }; })@:build(hxsl.Macros.buildShader())@:autoBuild(hxsl.Macros.buildShader())