mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2025-01-12 12:08:58 +01:00
37 lines
1.2 KiB
Go
37 lines
1.2 KiB
Go
// Copyright 2020 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build ignore
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package main
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var Time float
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var Cursor vec2
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var ScreenSize vec2
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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// Normalize the position to [0, 1].
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pos := position.xy / imageDstTextureSize()
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origin, size := imageDstRegionOnTexture()
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pos -= origin
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pos /= size
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pos += Cursor / ScreenSize / 4
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clr := 0.0
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clr += sin(pos.x*cos(Time/15)*80) + cos(pos.y*cos(Time/15)*10)
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clr += sin(pos.y*sin(Time/10)*40) + cos(pos.x*sin(Time/25)*40)
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clr += sin(pos.x*sin(Time/5)*10) + sin(pos.y*sin(Time/35)*80)
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clr *= sin(Time/10) * 0.5
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return vec4(clr, clr*0.5, sin(clr+Time/3)*0.75, 1)
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}
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