canvas example: add image quad

AllenDang · Oct 24, 2023 · 89122c3 · 89122c3
1 parent 0cc79b2
commit 89122c3
Showing 1 changed file with 21 additions and 10 deletions.
diff --git a/examples/canvas/canvas.go b/examples/canvas/canvas.go
@@ -17,37 +17,48 @@ func loop() {
 		g.Custom(func() {
 			canvas := g.GetCanvas()
 			pos := g.GetCursorScreenPos()
-			color := color.RGBA{200, 75, 75, 255}
-			canvas.AddLine(pos, pos.Add(image.Pt(100, 100)), color, 1)
-			canvas.AddRect(pos.Add(image.Pt(110, 0)), pos.Add(image.Pt(200, 100)), color, 5, g.DrawFlagsRoundCornersAll, 1)
-			canvas.AddRectFilled(pos.Add(image.Pt(220, 0)), pos.Add(image.Pt(320, 100)), color, 0, 0)
+			col := color.RGBA{200, 75, 75, 255}
+			canvas.AddLine(pos, pos.Add(image.Pt(100, 100)), col, 1)
+			canvas.AddRect(pos.Add(image.Pt(110, 0)), pos.Add(image.Pt(200, 100)), col, 5, g.DrawFlagsRoundCornersAll, 1)
+			canvas.AddRectFilled(pos.Add(image.Pt(220, 0)), pos.Add(image.Pt(320, 100)), col, 0, 0)
 
 			pos0 := pos.Add(image.Pt(0, 110))
 			cp0 := pos.Add(image.Pt(80, 110))
 			cp1 := pos.Add(image.Pt(50, 210))
 			pos1 := pos.Add(image.Pt(120, 210))
-			canvas.AddBezierCubic(pos0, cp0, cp1, pos1, color, 1, 0)
+			canvas.AddBezierCubic(pos0, cp0, cp1, pos1, col, 1, 0)
 
 			p1 := pos.Add(image.Pt(160, 110))
 			p2 := pos.Add(image.Pt(120, 210))
 			p3 := pos.Add(image.Pt(210, 210))
 			p4 := pos.Add(image.Pt(210, 150))
-			// canvas.AddTriangle(p1, p2, p3, color, 2)
-			canvas.AddQuad(p1, p2, p3, p4, color, 1)
+			// canvas.AddTriangle(p1, p2, p3, col, 2)
+			canvas.AddQuad(p1, p2, p3, p4, col, 1)
 
 			p1 = p1.Add(image.Pt(120, 60))
-			canvas.AddCircleFilled(p1, 50, color)
+			canvas.AddCircleFilled(p1, 50, col)
 
 			p1 = pos.Add(image.Pt(10, 400))
 			p2 = pos.Add(image.Pt(50, 440))
 			p3 = pos.Add(image.Pt(200, 500))
 			canvas.PathLineTo(p1)
 			canvas.PathLineTo(p2)
 			canvas.PathBezierCubicCurveTo(p2.Add(image.Pt(40, 0)), p3.Add(image.Pt(-50, 0)), p3, 0)
-			canvas.PathStroke(color, 0, 1)
+			canvas.PathStroke(col, 0, 1)
 
 			if texture != nil {
-				canvas.AddImage(texture, image.Pt(350, 25), image.Pt(500, 125))
+				canvas.AddImage(texture, image.Pt(pos.X+350, pos.Y+25), image.Pt(pos.X+500, pos.Y+125))
+				p1 = image.Pt(pos.X+350, pos.Y+200)
+				p2 = image.Pt(pos.X+350, pos.Y+400)
+				p3 = image.Pt(pos.X+550, pos.Y+300)
+				p4 = image.Pt(pos.X+500, pos.Y+200)
+				canvas.AddImageQuad(texture, p1, p2, p3, p4,
+					image.Pt(0, 0),
+					image.Pt(1, 0),
+					image.Pt(1, 1),
+					image.Pt(0, 1),
+					color.RGBA{255, 255, 255, 100},
+				)
 			}
 		}),
 	)