ebiten/examples/shader/radialblur.go
Hajime Hoshi 63df6168d9 internal/shader: use plural forms for Kage compiler directives
This change renames

```
//kage:unit texel
//kage:unit pixel
```

to

```
//kage:unit texels
//kage:unit pixels
```

.

Closes #2717
2023-08-01 11:41:38 +09:00

44 lines
1.1 KiB
Go

// Copyright 2020 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build ignore
//kage:unit pixels
package main
var Time float
var Cursor vec2
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
dstOrigin, _ := imageDstRegionOnTexture()
pos := position.xy - dstOrigin
dir := normalize(pos - Cursor)
clr := imageSrc2UnsafeAt(texCoord)
samples := [...]float{
-22, -14, -8, -4, -2, 2, 4, 8, 14, 22,
}
sum := clr
for i := 0; i < len(samples); i++ {
sum += imageSrc2At(texCoord + dir*samples[i])
}
sum /= 10 + 1
dist := distance(pos, Cursor)
t := clamp(dist/256, 0, 1)
return mix(clr, sum, t)
}