crunchy-rocks/draw2d
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update gl sample

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This commit is contained in:
Laurent Le Goff 2011-05-18 09:44:58 +02:00
parent 8bc0343156
commit a68b429f0f
1 changed files with 2 additions and 29 deletions
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31
cmd/draw2dgl.go
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@ -24,8 +24,6 @@ import (
"strings" "strings"
"gl" "gl"
"glut" "glut"
"image"
"draw2d.googlecode.com/hg/draw2d"
"draw2d.googlecode.com/hg/draw2dgl" "draw2d.googlecode.com/hg/draw2dgl"
"draw2d.googlecode.com/hg/postscript" "draw2d.googlecode.com/hg/postscript"
"log" "log"
@ -34,30 +32,6 @@ import (
var postscriptContent string var postscriptContent string
func TestDrawCubicCurve(gc draw2d.GraphicContext) {
// draw a cubic curve
x, y := 25.6, 128.0
x1, y1 := 102.4, 230.4
x2, y2 := 153.6, 25.6
x3, y3 := 230.4, 128.0
gc.SetStrokeColor(image.NRGBAColor{0, 0, 0, 0xff})
gc.SetLineWidth(10)
gc.MoveTo(x, y)
gc.CubicCurveTo(x1, y1, x2, y2, x3, y3)
gc.Stroke()
gc.SetStrokeColor(image.NRGBAColor{0xFF, 0x33, 0x33, 0x99})
gc.SetLineWidth(6)
// draw segment of curve
gc.MoveTo(x, y)
gc.LineTo(x1, y1)
gc.MoveTo(x2, y2)
gc.LineTo(x3, y3)
gc.Stroke()
}
var ( var (
width, height int width, height int
rotate int rotate int
@ -79,12 +53,11 @@ func reshape(w, h int) {
gl.Translatef(0, float32(-h), 0) /* Shift origin up to upper-left corner. */ gl.Translatef(0, float32(-h), 0) /* Shift origin up to upper-left corner. */
gl.Enable(gl.BLEND) gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA) gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Disable(gl.DEPTH_TEST);
width, height = w, h width, height = w, h
} }
func display() { func display() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LineWidth(1) gl.LineWidth(1)
gc := draw2dgl.NewGraphicContext(width, height) gc := draw2dgl.NewGraphicContext(width, height)
@ -115,7 +88,7 @@ func main() {
postscriptContent = string(bytes) postscriptContent = string(bytes)
glut.Init() glut.Init()
glut.InitWindowSize(800, 800) glut.InitWindowSize(800, 800)
glut.CreateWindow("single triangle") glut.CreateWindow("Show Tiger in Opengl")
glut.DisplayFunc(display) glut.DisplayFunc(display)
glut.ReshapeFunc(reshape) glut.ReshapeFunc(reshape)