Function ThickLine

utils.go:784–835

(start, end Vector, thickness float32, color Color)

var indices []int32

func ThickLine(start, end Vector, thickness float32, color Color) {

	th := thickness

	diagStart1 := start.Sub(end).Unit().Rotate(math.Pi / 4).Scale(th)
	diagStart2 := start.Sub(end).Unit().Rotate(-math.Pi / 4).Scale(th)

	diagEnd1 := end.Sub(start).Unit().Rotate(math.Pi / 4).Scale(th)
	diagEnd2 := end.Sub(start).Unit().Rotate(-math.Pi / 4).Scale(th)

	vertices = append(vertices[:0],
		sdl.Vertex{
			Position: sdl.FPoint{
				start.X + diagStart1.X,
				start.Y + diagStart1.Y,
			},
			Color: color.SDLFColor(),
		},

		sdl.Vertex{
			Position: sdl.FPoint{
				start.X + diagStart2.X,
				start.Y + diagStart2.Y,
			},
			Color: color.SDLFColor(),
		},

		sdl.Vertex{
			Position: sdl.FPoint{
				end.X + diagEnd1.X,
				end.Y + diagEnd1.Y,
			},
			Color: color.SDLFColor(),
		},

		sdl.Vertex{
			Position: sdl.FPoint{
				end.X + diagEnd2.X,
				end.Y + diagEnd2.Y,
			},
			Color: color.SDLFColor(),
		},
	)

	indices = append(indices[:0],
		0, 1, 3,
		1, 2, 3,
	)

	globals.Renderer.RenderGeometry(globals.PlainWhiteTexture, vertices, indices)

}

func FilledCircleColor(x, y, radius int32, color Color) {