41 lines
765 B
Go
41 lines
765 B
Go
package example
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import (
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"math"
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"time"
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"github.com/tfriedel6/canvas"
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"github.com/tfriedel6/canvas/glimpl/ios"
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)
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var cv *canvas.Canvas
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var mx, my float64
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func TouchEvent(typ string, x, y int) {
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mx, my = float64(x), float64(y)
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}
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func LoadGL(w, h int) {
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err := canvas.LoadGL(glimplios.GLImpl{})
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if err != nil {
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time.Sleep(100 * time.Millisecond)
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panic(err)
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}
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cv = canvas.New(0, 0, w, h)
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}
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func DrawFrame() {
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if cv == nil {
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return
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}
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w, h := float64(cv.Width()), float64(cv.Height())
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cv.SetFillStyle("#000")
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cv.FillRect(0, 0, w, h)
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cv.SetFillStyle("#0F0")
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cv.FillRect(w*0.25, h*0.25, w*0.5, h*0.5)
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cv.SetLineWidth(6)
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sqrSize := math.Min(w, h) * 0.1
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cv.SetStrokeStyle("#F00")
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cv.StrokeRect(mx-sqrSize/2, my-sqrSize/2, sqrSize, sqrSize)
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}
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