mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
// Copyright 2015 Hajime Hoshi
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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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package main
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import (
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"github.com/hajimehoshi/ebiten"
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"image"
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"image/color"
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"log"
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"math/rand"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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)
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var rectsToDraw = make([]image.Rectangle, 100)
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func min(a, b int) int {
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if a < b {
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return a
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}
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return b
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}
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func max(a, b int) int {
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if a < b {
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return b
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}
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return a
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}
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func init() {
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for i, _ := range rectsToDraw {
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x0, x1 := rand.Intn(screenWidth), rand.Intn(screenWidth)
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y0, y1 := rand.Intn(screenHeight), rand.Intn(screenHeight)
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rectsToDraw[i] = image.Rect(min(x0, x1), min(y0, y1), max(x0, x1), max(y0, y1))
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}
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}
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type rects []image.Rectangle
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func (r rects) Len() int {
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return len(r)
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}
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func (r rects) Points(i int) (x0, y0, x1, y1 int) {
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rect := &r[i]
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return rect.Min.X, rect.Min.Y, rect.Max.X, rect.Max.Y
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}
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func update(screen *ebiten.Image) error {
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screen.DrawRects(color.NRGBA{0x80, 0x80, 0xff, 0x80}, rects(rectsToDraw))
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return nil
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}
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func main() {
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Shapes (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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