mirror of
https://github.com/hajimehoshi/ebiten.git
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42 lines
1.3 KiB
Go
42 lines
1.3 KiB
Go
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// 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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// +build ignore
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package main
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var Time float
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var Mouse vec2
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// viewportSize is a predefined function.
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func Vertex(position vec2, texCoord vec2, color vec4) vec4 {
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return mat4(
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2/viewportSize().x, 0, 0, 0,
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0, 2/viewportSize().y, 0, 0,
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0, 0, 1, 0,
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-1, -1, 0, 1,
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) * vec4(position, 0, 1)
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}
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func Fragment(position vec4) vec4 {
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pos := position.xy/viewportSize() + Mouse/viewportSize()/4
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color := 0.0
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color += sin(pos.x*cos(Time/15)*80) + cos(pos.y*cos(Time/15)*10)
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color += sin(pos.y*sin(Time/10)*40) + cos(pos.x*sin(Time/25)*40)
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color += sin(pos.x*sin(Time/5)*10) + sin(pos.y*sin(Time/35)*80)
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color *= sin(Time/10) * 0.5
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return vec4(color, color*0.5, sin(color+Time/3)*0.75, 1)
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}
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