From 500caaeda74dd9c660279036293f4b2997cf0b03 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Sat, 9 Sep 2017 09:42:37 +0200 Subject: Add vendor --- .../llgcode/draw2d/samples/geometry/geometry.go | 334 +++++++++++++++++++++ 1 file changed, 334 insertions(+) create mode 100644 vendor/github.com/llgcode/draw2d/samples/geometry/geometry.go (limited to 'vendor/github.com/llgcode/draw2d/samples/geometry/geometry.go') diff --git a/vendor/github.com/llgcode/draw2d/samples/geometry/geometry.go b/vendor/github.com/llgcode/draw2d/samples/geometry/geometry.go new file mode 100644 index 0000000..99f1731 --- /dev/null +++ b/vendor/github.com/llgcode/draw2d/samples/geometry/geometry.go @@ -0,0 +1,334 @@ +// Copyright 2010 The draw2d Authors. All rights reserved. +// created: 21/11/2010 by Laurent Le Goff + +// Package geometry draws some geometric tests. +package geometry + +import ( + "image" + "image/color" + "math" + + "github.com/llgcode/draw2d" + "github.com/llgcode/draw2d/draw2dkit" + "github.com/llgcode/draw2d/samples" + "github.com/llgcode/draw2d/samples/gopher2" +) + +// Main draws geometry and returns the filename. This should only be +// used during testing. +func Main(gc draw2d.GraphicContext, ext string) (string, error) { + // Draw the droid + Draw(gc, 297, 210) + + // Return the output filename + return samples.Output("geometry", ext), nil +} + +// Bubble draws a text balloon. +func Bubble(gc draw2d.GraphicContext, x, y, width, height float64) { + sx, sy := width/100, height/100 + gc.MoveTo(x+sx*50, y) + gc.QuadCurveTo(x, y, x, y+sy*37.5) + gc.QuadCurveTo(x, y+sy*75, x+sx*25, y+sy*75) + gc.QuadCurveTo(x+sx*25, y+sy*95, x+sx*5, y+sy*100) + gc.QuadCurveTo(x+sx*35, y+sy*95, x+sx*40, y+sy*75) + gc.QuadCurveTo(x+sx*100, y+sy*75, x+sx*100, y+sy*37.5) + gc.QuadCurveTo(x+sx*100, y, x+sx*50, y) + gc.Stroke() +} + +// CurveRectangle draws a rectangle with bezier curves (not rounded rectangle). +func CurveRectangle(gc draw2d.GraphicContext, x0, y0, + rectWidth, rectHeight float64, stroke, fill color.Color) { + radius := (rectWidth + rectHeight) / 4 + + x1 := x0 + rectWidth + y1 := y0 + rectHeight + if rectWidth/2 < radius { + if rectHeight/2 < radius { + gc.MoveTo(x0, (y0+y1)/2) + gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0) + gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2) + gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1) + gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2) + } else { + gc.MoveTo(x0, y0+radius) + gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0) + gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius) + gc.LineTo(x1, y1-radius) + gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1) + gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius) + } + } else { + if rectHeight/2 < radius { + gc.MoveTo(x0, (y0+y1)/2) + gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0) + gc.LineTo(x1-radius, y0) + gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2) + gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1) + gc.LineTo(x0+radius, y1) + gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2) + } else { + gc.MoveTo(x0, y0+radius) + gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0) + gc.LineTo(x1-radius, y0) + gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius) + gc.LineTo(x1, y1-radius) + gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1) + gc.LineTo(x0+radius, y1) + gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius) + } + } + gc.Close() + gc.SetStrokeColor(stroke) + gc.SetFillColor(fill) + gc.SetLineWidth(10.0) + gc.FillStroke() +} + +// Dash draws a line with a dash pattern +func Dash(gc draw2d.GraphicContext, x, y, width, height float64) { + sx, sy := width/162, height/205 + gc.SetStrokeColor(image.Black) + gc.SetLineDash([]float64{height / 10, height / 50, height / 50, height / 50}, -50.0) + gc.SetLineCap(draw2d.ButtCap) + gc.SetLineJoin(draw2d.RoundJoin) + gc.SetLineWidth(height / 50) + + gc.MoveTo(x+sx*60.0, y) + gc.LineTo(x+sx*60.0, y) + gc.LineTo(x+sx*162, y+sy*205) + rLineTo(gc, sx*-102.4, 0) + gc.CubicCurveTo(x+sx*-17, y+sy*205, x+sx*-17, y+sy*103, x+sx*60.0, y+sy*103.0) + gc.Stroke() + gc.SetLineDash(nil, 0.0) +} + +// Arc draws an arc with a positive angle (clockwise) +func Arc(gc draw2d.GraphicContext, xc, yc, width, height float64) { + // draw an arc + xc += width / 2 + yc += height / 2 + radiusX, radiusY := width/2, height/2 + startAngle := 45 * (math.Pi / 180.0) /* angles are specified */ + angle := 135 * (math.Pi / 180.0) /* clockwise in radians */ + gc.SetLineWidth(width / 10) + gc.SetLineCap(draw2d.ButtCap) + gc.SetStrokeColor(image.Black) + gc.MoveTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY) + gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle) + gc.Stroke() + + // fill a circle + gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80}) + gc.SetFillColor(color.NRGBA{255, 0x33, 0x33, 0x80}) + gc.SetLineWidth(width / 20) + + gc.MoveTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY) + gc.LineTo(xc, yc) + gc.LineTo(xc-radiusX, yc) + gc.Stroke() + + gc.MoveTo(xc, yc) + gc.ArcTo(xc, yc, width/10.0, height/10.0, 0, 2*math.Pi) + gc.Fill() +} + +// ArcNegative draws an arc with a negative angle (anti clockwise). +func ArcNegative(gc draw2d.GraphicContext, xc, yc, width, height float64) { + xc += width / 2 + yc += height / 2 + radiusX, radiusY := width/2, height/2 + startAngle := 45.0 * (math.Pi / 180.0) /* angles are specified */ + angle := -225 * (math.Pi / 180.0) /* clockwise in radians */ + gc.SetLineWidth(width / 10) + gc.SetLineCap(draw2d.ButtCap) + gc.SetStrokeColor(image.Black) + + gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle) + gc.Stroke() + // fill a circle + gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80}) + gc.SetFillColor(color.NRGBA{255, 0x33, 0x33, 0x80}) + gc.SetLineWidth(width / 20) + + gc.MoveTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY) + gc.LineTo(xc, yc) + gc.LineTo(xc-radiusX, yc) + gc.Stroke() + + gc.ArcTo(xc, yc, width/10.0, height/10.0, 0, 2*math.Pi) + gc.Fill() +} + +// CubicCurve draws a cubic curve with its control points. +func CubicCurve(gc draw2d.GraphicContext, x, y, width, height float64) { + sx, sy := width/162, height/205 + x0, y0 := x, y+sy*100.0 + x1, y1 := x+sx*75, y+sy*205 + x2, y2 := x+sx*125, y + x3, y3 := x+sx*205, y+sy*100 + + gc.SetStrokeColor(image.Black) + gc.SetFillColor(color.NRGBA{0xAA, 0xAA, 0xAA, 0xFF}) + gc.SetLineWidth(width / 10) + gc.MoveTo(x0, y0) + gc.CubicCurveTo(x1, y1, x2, y2, x3, y3) + gc.Stroke() + + gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0x88}) + + gc.SetLineWidth(width / 20) + // draw segment of curve + gc.MoveTo(x0, y0) + gc.LineTo(x1, y1) + gc.LineTo(x2, y2) + gc.LineTo(x3, y3) + gc.Stroke() +} + +// FillString draws a filled and stroked string. +func FillString(gc draw2d.GraphicContext, x, y, width, height float64) { + sx, sy := width/100, height/100 + gc.Save() + gc.SetStrokeColor(image.Black) + gc.SetLineWidth(1) + draw2dkit.RoundedRectangle(gc, x+sx*5, y+sy*5, x+sx*95, y+sy*95, sx*10, sy*10) + gc.FillStroke() + gc.SetFillColor(image.Black) + gc.SetFontSize(height / 6) + gc.Translate(x+sx*6, y+sy*52) + gc.SetFontData(draw2d.FontData{ + Name: "luxi", + Family: draw2d.FontFamilyMono, + Style: draw2d.FontStyleBold | draw2d.FontStyleItalic}) + w := gc.FillString("Hug") + gc.Translate(w+sx, 0) + left, top, right, bottom := gc.GetStringBounds("cou") + gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80}) + draw2dkit.Rectangle(gc, left, top, right, bottom) + gc.SetLineWidth(height / 50) + gc.Stroke() + gc.SetFillColor(color.NRGBA{0x33, 0x33, 0xff, 0xff}) + gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0xff, 0xff}) + gc.SetLineWidth(height / 100) + gc.StrokeString("Hug") + gc.Restore() +} + +// FillStroke first fills and afterwards strokes a path. +func FillStroke(gc draw2d.GraphicContext, x, y, width, height float64) { + sx, sy := width/210, height/215 + gc.MoveTo(x+sx*113.0, y) + gc.LineTo(x+sx*215.0, y+sy*215) + rLineTo(gc, sx*-100, 0) + gc.CubicCurveTo(x+sx*35, y+sy*215, x+sx*35, y+sy*113, x+sx*113.0, y+sy*113) + gc.Close() + + gc.MoveTo(x+sx*50.0, y) + rLineTo(gc, sx*51.2, sy*51.2) + rLineTo(gc, sx*-51.2, sy*51.2) + rLineTo(gc, sx*-51.2, sy*-51.2) + gc.Close() + + gc.SetLineWidth(width / 20.0) + gc.SetFillColor(color.NRGBA{0, 0, 0xFF, 0xFF}) + gc.SetStrokeColor(image.Black) + gc.FillStroke() +} + +func rLineTo(path draw2d.PathBuilder, x, y float64) { + x0, y0 := path.LastPoint() + path.LineTo(x0+x, y0+y) +} + +// FillStyle demonstrates the difference between even odd and non zero winding rule. +func FillStyle(gc draw2d.GraphicContext, x, y, width, height float64) { + sx, sy := width/232, height/220 + gc.SetLineWidth(width / 40) + + draw2dkit.Rectangle(gc, x+sx*0, y+sy*12, x+sx*232, y+sy*70) + + var wheel1, wheel2 draw2d.Path + wheel1.ArcTo(x+sx*52, y+sy*70, sx*40, sy*40, 0, 2*math.Pi) + wheel2.ArcTo(x+sx*180, y+sy*70, sx*40, sy*40, 0, -2*math.Pi) + + gc.SetFillRule(draw2d.FillRuleEvenOdd) + gc.SetFillColor(color.NRGBA{0, 0xB2, 0, 0xFF}) + + gc.SetStrokeColor(image.Black) + gc.FillStroke(&wheel1, &wheel2) + + draw2dkit.Rectangle(gc, x, y+sy*140, x+sx*232, y+sy*198) + wheel1.Clear() + wheel1.ArcTo(x+sx*52, y+sy*198, sx*40, sy*40, 0, 2*math.Pi) + wheel2.Clear() + wheel2.ArcTo(x+sx*180, y+sy*198, sx*40, sy*40, 0, -2*math.Pi) + + gc.SetFillRule(draw2d.FillRuleWinding) + gc.SetFillColor(color.NRGBA{0, 0, 0xE5, 0xFF}) + gc.FillStroke(&wheel1, &wheel2) +} + +// PathTransform scales a path differently in horizontal and vertical direction. +func PathTransform(gc draw2d.GraphicContext, x, y, width, height float64) { + gc.Save() + gc.SetLineWidth(width / 10) + gc.Translate(x+width/2, y+height/2) + gc.Scale(1, 4) + gc.ArcTo(0, 0, width/8, height/8, 0, math.Pi*2) + gc.Close() + gc.Stroke() + gc.Restore() +} + +// Star draws many lines from a center. +func Star(gc draw2d.GraphicContext, x, y, width, height float64) { + gc.Save() + gc.Translate(x+width/2, y+height/2) + gc.SetLineWidth(width / 40) + for i := 0.0; i < 360; i = i + 10 { // Go from 0 to 360 degrees in 10 degree steps + gc.Save() // Keep rotations temporary + gc.Rotate(i * (math.Pi / 180.0)) // Rotate by degrees on stack from 'for' + gc.MoveTo(0, 0) + gc.LineTo(width/2, 0) + gc.Stroke() + gc.Restore() + } + gc.Restore() +} + +// Draw all figures in a nice 4x3 grid. +func Draw(gc draw2d.GraphicContext, width, height float64) { + mx, my := width*0.025, height*0.025 // margin + dx, dy := (width-2*mx)/4, (height-2*my)/3 + w, h := dx-2*mx, dy-2*my + x0, y := 2*mx, 2*my + x := x0 + Bubble(gc, x, y, w, h) + x += dx + CurveRectangle(gc, x, y, w, h, color.NRGBA{0x80, 0, 0, 0x80}, color.NRGBA{0x80, 0x80, 0xFF, 0xFF}) + x += dx + Dash(gc, x, y, w, h) + x += dx + Arc(gc, x, y, w, h) + x = x0 + y += dy + ArcNegative(gc, x, y, w, h) + x += dx + CubicCurve(gc, x, y, w, h) + x += dx + FillString(gc, x, y, w, h) + x += dx + FillStroke(gc, x, y, w, h) + x = x0 + y += dy + FillStyle(gc, x, y, w, h) + x += dx + PathTransform(gc, x, y, w, h) + x += dx + Star(gc, x, y, w, h) + x += dx + gopher2.Draw(gc, x, y, w, h/2) +} -- cgit v1.2.3