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Begin to work on matrix transformation (does not yet really work)

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This commit is contained in:
legoff.laurent 2010-11-25 17:51:30 +00:00
parent 10fb830ac9
commit 2d02464b73
3 changed files with 157 additions and 18 deletions
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17
draw2d/src/cmd/ps_tests/TestStar.ps Normal file
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@ -0,0 +1,17 @@
%!
% Example of rotation... draws 36 lines in a circular pattern
0 10 360 { % Go from 0 to 360 degrees in 10 degree steps
newpath % Start a new path
gsave % Keep rotations temporary
144 144 moveto
rotate % Rotate by degrees on stack from 'for'
72 0 rlineto
stroke
grestore % Get back the unrotated state
} for % Iterate over angles
showpage

50
draw2d/src/cmd/ps_tests/TestTransform.ps Normal file
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@ -0,0 +1,50 @@
%!
% Example to demonstrate translate, rotate, and scale
% operator box: xcoord ycoord box -
% Creates one inch box at xcoord, ycoord
/box {
newpath
moveto
72 0 rlineto
0 72 rlineto
-72 0 rlineto
closepath
} def
% Specify font for text labels
/Helvetica findfont 40 scalefont setfont
gsave
40 40 translate % Set origin to (40, 40)
0 0 box stroke % Draw box at new origin...
77 0 moveto
(Translated) show % and label
grestore
gsave
100 150 translate % Translate origin to (100, 150)
30 rotate % Rotate counter-clockwise by 30 degrees
0 0 box stroke % Draw box...
75 0 moveto
(Translated & Rotated) show % and label
grestore
gsave
40 300 translate % Translate to (40, 300)
0.5 1 scale % Reduce x coord by 1/2, y coord left alone
0 0 box stroke % Draw box...
75 0 moveto
(Translated & Squished) show % and label
grestore
gsave
300 300 translate % Set origin to (300, 300)
45 rotate % Rotate coordinates by 45 degrees
0.5 1 scale % Scale coordinates
0 0 box stroke % Draw box
75 0 moveto
(Everything) show
grestore
showpage

108
draw2d/src/cmd/testdraw2d.go
View file

@ -68,11 +68,12 @@ func saveToPngFile(TestName string, m image.Image) {
*/
func TestPath() {
i, gc := initGc(w, h)
gc.MoveTo(10.0, 10.0)
gc.LineTo(100.0, 10.0)
gc.Translate(10,10)
gc.MoveTo(0.0, 0.0)
gc.LineTo(100.0, 00.0)
gc.LineTo(100.0, 100.0)
gc.LineTo(10.0, 100.0)
gc.LineTo(10.0, 10.0)
gc.LineTo(0.0, 100.0)
gc.LineTo(0.0, 0.0)
gc.FillStroke()
saveToPngFile("TestPath", i)
}
@ -127,13 +128,15 @@ func TestDrawArcNegative() {
gc.SetLineWidth(10)
gc.SetLineCap(draw2d.ButtCap)
gc.SetStrokeColor(image.Black)
gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle)
gc.Stroke()
// fill a circle
gc.SetStrokeColor(image.RGBAColor{255, 0x33, 0x33, 0x80})
gc.SetFillColor(image.RGBAColor{255, 0x33, 0x33, 0x80})
gc.SetLineWidth(6)
gc.MoveTo(xc, yc)
gc.LineTo(xc+cos(startAngle)*radiusX, yc+sin(startAngle)*radiusY)
gc.MoveTo(xc, yc)
@ -190,7 +193,7 @@ func TestCurveRectangle() {
gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius)
}
}
gc.Close()
gc.ClosePath()
gc.SetFillColor(image.RGBAColor{0x80, 0x80, 0xFF, 0xFF})
gc.SetStrokeColor(image.RGBAColor{0x80, 0, 0, 0x80})
@ -258,13 +261,13 @@ func TestFillStroke() {
gc.LineTo(230.4, 230.4)
gc.RLineTo(-102.4, 0.0)
gc.CubicCurveTo(51.2, 230.4, 51.2, 128.0, 128.0, 128.0)
gc.Close()
gc.ClosePath()
gc.MoveTo(64.0, 25.6)
gc.RLineTo(51.2, 51.2)
gc.RLineTo(-51.2, 51.2)
gc.RLineTo(-51.2, -51.2)
gc.Close()
gc.ClosePath()
gc.SetLineWidth(10.0)
gc.SetFillColor(image.RGBAColor{0, 0, 0xFF, 0xFF})
@ -338,7 +341,7 @@ func TestRoundRectangle() {
gc.ArcTo(x+width-radius, y+height-radius, radius, radius, 0*degrees, 90*degrees)
gc.ArcTo(x+radius, y+height-radius, radius, radius, 90*degrees, 90*degrees)
gc.ArcTo(x+radius, y+radius, radius, radius, 180*degrees, 90*degrees)
gc.Close()
gc.ClosePath()
gc.SetFillColor(image.RGBAColor{0x80, 0x80, 0xFF, 0xFF})
gc.SetStrokeColor(image.RGBAColor{0x80, 0, 0, 0x80})
@ -401,18 +404,85 @@ func TestLineJoin() {
func TestBubble() {
i, gc := initGc(w, h)
gc.BeginPath();
gc.MoveTo(75,25);
gc.QuadCurveTo(25,25,25,62.5);
gc.QuadCurveTo(25,100,50,100);
gc.QuadCurveTo(50,120,30,125);
gc.QuadCurveTo(60,120,65,100);
gc.QuadCurveTo(125,100,125,62.5);
gc.QuadCurveTo(125,25,75,25);
gc.Stroke();
gc.BeginPath()
gc.MoveTo(75,25)
gc.QuadCurveTo(25,25,25,62.5)
gc.QuadCurveTo(25,100,50,100)
gc.QuadCurveTo(50,120,30,125)
gc.QuadCurveTo(60,120,65,100)
gc.QuadCurveTo(125,100,125,62.5)
gc.QuadCurveTo(125,25,75,25)
gc.Stroke()
saveToPngFile("TestBubble", i)
}
func TestStar() {
i, gc := initGc(w, h)
for i := 0.0 ; i < 360; i = i + 10 {// Go from 0 to 360 degrees in 10 degree steps
gc.BeginPath() // Start a new path
gc.Save() // Keep rotations temporary
gc.MoveTo(144, 144)
gc.Rotate(i * (math.Pi / 180.0)) // Rotate by degrees on stack from 'for'
gc.RLineTo(72, 0)
gc.Stroke()
gc.Restore() // Get back the unrotated state
}
saveToPngFile("TestStar", i)
}
func TestTransform() {
i, gc := initGc(800, 600)
gc.Save()
gc.Translate(40, 40) // Set origin to (40, 40)
gc.BeginPath()
gc.MoveTo(0,0)
gc.RLineTo(72,0)
gc.RLineTo(0, 72)
gc.RLineTo(-72,0)
gc.ClosePath()
gc.Stroke()
gc.Restore()
gc.Save()
gc.Translate(100, 150) // Translate origin to (100, 150)
gc.Rotate(30* (math.Pi / 180.0)) // Rotate counter-clockwise by 30 degrees
gc.BeginPath()
gc.MoveTo(0,0)
gc.RLineTo(72,0)
gc.RLineTo(0, 72)
gc.RLineTo(-72,0)
gc.ClosePath() // Draw box...
gc.Stroke()
gc.Restore()
gc.Save()
gc.Translate(40, 300) // Translate to (40, 300)
gc.Scale(0.5, 1) // Reduce x coord by 1/2, y coord left alone
gc.BeginPath()
gc.MoveTo(0,0)
gc.RLineTo(72,0)
gc.RLineTo(0, 72)
gc.RLineTo(-72,0)
gc.ClosePath() // Draw box...
gc.Stroke()
gc.Restore()
gc.Save()
gc.Translate(300, 300) // Set origin to (300, 300)
gc.Rotate(45* (math.Pi / 180.0)) // Rotate coordinates by 45 degrees
gc.Scale(0.5, 1) // Scale coordinates
gc.BeginPath()
gc.MoveTo(0,0)
gc.RLineTo(72,0)
gc.RLineTo(0, 72)
gc.RLineTo(-72,0)
gc.ClosePath() // Draw box
gc.Stroke()
gc.Restore()
saveToPngFile("TestTransform", i)
}
func main() {
TestPath()
@ -428,4 +498,6 @@ func main() {
TestLineCap()
TestLineJoin()
TestBubble()
TestStar()
TestTransform()
}