ebiten/examples/shader/water.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
1.2 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, dstSize := imageDstRegionOnTexture()
pos := position.xy - dstOrigin
border := dstSize.y*0.6 + 4*cos(Time*3+pos.y/10)
if pos.y < border {
return imageSrc2UnsafeAt(texCoord)
}
xoffset := 4 * cos(Time*3+pos.y/10)
yoffset := 20 * (1 + cos(Time*3+pos.y/40))
srcOrigin, _ := imageSrcRegionOnTexture()
clr := imageSrc2At(vec2(
texCoord.x+xoffset,
-(texCoord.y+yoffset-srcOrigin.y)+border*2+srcOrigin.y,
)).rgb
overlay := vec3(0.5, 1, 1)
return vec4(mix(clr, overlay, 0.25), 1)
}