88 lines
3.1 KiB
Swift
88 lines
3.1 KiB
Swift
//
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/**
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* Copyright (c) 2019 Razeware LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Notwithstanding the foregoing, you may not use, copy, modify, merge, publish,
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* distribute, sublicense, create a derivative work, and/or sell copies of the
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* Software in any work that is designed, intended, or marketed for pedagogical or
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* instructional purposes related to programming, coding, application development,
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* or information technology. Permission for such use, copying, modification,
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* merger, publication, distribution, sublicensing, creation of derivative works,
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* or sale is expressly withheld.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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import CoreGraphics
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import simd
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extension Renderer {
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func fire(size: CGSize) -> Emitter {
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let emitter = Emitter()
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emitter.particleCount = 1200
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emitter.particleTexture = Emitter.loadTexture(imageName: "fire")!
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emitter.birthRate = 5
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var descriptor = ParticleDescriptor()
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descriptor.position.x = Float(size.width) / 2 - 90
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descriptor.positionXRange = 0...180
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descriptor.direction = Float.pi / 2
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descriptor.directionRange = -0.3...0.3
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descriptor.speed = 3
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descriptor.pointSize = 80
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descriptor.startScale = 0
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descriptor.startScaleRange = 0.5...1.0
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descriptor.endScaleRange = 0...0
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descriptor.life = 180
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descriptor.lifeRange = -50...70
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descriptor.color = float4(1.0, 0.392, 0.1, 0.5);
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emitter.particleDescriptor = descriptor
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return emitter
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}
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func snow(size: CGSize) -> Emitter {
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let emitter = Emitter()
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// 1
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emitter.particleCount = 100
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emitter.birthRate = 1
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emitter.birthDelay = 20
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// 2
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emitter.particleTexture = Emitter.loadTexture(imageName: "snowflake")!
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// 3
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var descriptor = ParticleDescriptor()
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descriptor.position.x = 0
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descriptor.positionXRange = 0...Float(size.width)
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descriptor.direction = -.pi / 2
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descriptor.speedRange = 2...6
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descriptor.pointSizeRange = 80 * 0.5...80
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descriptor.startScale = 0
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descriptor.startScaleRange = 0.2...1.0
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// 4
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descriptor.life = 500
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descriptor.color = [1, 1, 1, 1]
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emitter.particleDescriptor = descriptor
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return emitter
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}
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}
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