func drawCircle(x, y, r float64) {
//@TODO: Should speed this up by pre-computing all these cos() and sin() calculations and storing in a lookup table.
gl.Begin(gl.TRIANGLE_FAN)
// gl.Color3d(me.red, me.green, me.blue)
gl.Vertex2d(x, y)
pi2 := 2 * math.Pi
num := 36
dTheta := pi2 / float64(num)
theta := float64(0)
for i := 0; i < num; i++ {
theta += dTheta
dx := math.Cos(theta) * r
dy := math.Sin(theta) * r
gl.Vertex2d(x+dx, y+dy)
}
theta += dTheta
dx := math.Cos(theta) * r
dy := math.Sin(theta) * r
gl.Vertex2d(x+dx, y+dy)
gl.End()
}
func drawLine(x1, y1, x2, y2 float64) {
gl.Begin(gl.LINES)
gl.Vertex2d(x1, y1)
gl.Vertex2d(x2, y2)
gl.End()
}
func DrawLine(start, end vect.Vect) {
gl.Begin(gl.LINES)
defer gl.End()
gl.Vertex2d(start.X, start.Y)
gl.Vertex2d(end.X, end.Y)
}
func drawSquare(x, y, length float64) {
x2 := x + length
y2 := y + length
gl.Begin(gl.QUADS)
gl.Color3d(0.75, 0.35, 0.35)
gl.Vertex2d(x, y)
gl.Vertex2d(x2, y)
gl.Vertex2d(x2, y2)
gl.Vertex2d(x, y2)
gl.End()
}
func DrawQuad(upperLeft, lowerRight vect.Vect, filled bool) {
if filled {
gl.Begin(gl.QUADS)
} else {
gl.Begin(gl.LINE_LOOP)
}
defer gl.End()
gl.Vertex2d(upperLeft.X, upperLeft.Y)
gl.Vertex2d(upperLeft.X, lowerRight.Y)
gl.Vertex2d(lowerRight.X, lowerRight.Y)
gl.Vertex2d(lowerRight.X, upperLeft.Y)
}
func DrawPoly(vertices []vect.Vect, vertCount int, filled bool) {
if filled {
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex2d(vertices[0].X, vertices[0].Y)
} else {
gl.Begin(gl.LINE_LOOP)
}
defer gl.End()
for i := 0; i < vertCount; i++ {
v := vertices[i]
gl.Vertex2d(v.X, v.Y)
}
}
func DrawCircle(pos vect.Vect, radius float64, filled bool) {
if filled {
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex2d(pos.X, pos.Y)
} else {
gl.Begin(gl.LINE_LOOP)
}
defer gl.End()
var d float64
for i := 0.0; i <= 360; i += circlestep {
d = deg2grad * i
gl.Vertex2d(pos.X+math.Cos(d)*radius, pos.Y+math.Sin(d)*radius)
}
}
func (pp Points) Render() {
gl.Begin(gl.POINTS)
for _, p := range pp {
gl.Vertex2d(p.X, p.Y)
}
gl.End()
}
func (v *Voronoi) Render(w, h, d float64) {
gl.PushMatrix()
gl.Scaled(w, h, 1)
rng := rand.New(rand.NewSource(42))
rng.Seed(42)
// Draw fill colors
for _, wall := range v.cellWalls {
gl.Color3ub(
uint8(100+rng.Int31n(128)),
uint8(100+rng.Int31n(128)),
uint8(100+rng.Int31n(128)))
gl.Begin(gl.TRIANGLE_FAN)
for _, p := range wall {
if p != nil && boundedPoint(p) {
gl.Vertex2d(p.X, p.Y)
}
}
gl.End()
}
// Draw lines
gl.LineWidth(1.5)
gl.Color3ub(0, 128, 0)
gl.Begin(gl.LINES)
for _, edge := range v.edges {
if boundedEdge(edge) {
gl.Vertex2d(edge.Start.X, edge.Start.Y)
gl.Vertex2d(edge.End.X, edge.End.Y)
}
}
gl.End()
// Draw points.
gl.PointSize(2)
gl.Color3ub(255, 255, 255)
gl.Begin(gl.POINTS)
for _, point := range v.points {
gl.Vertex2d(point.X, point.Y)
}
gl.End()
gl.PopMatrix()
}
func (self *Inventory) ShowTooltip(x, y float64, str string) {
h, w := inventoryItemFont.Measure(str)
pad := 4 * PIXEL_SCALE
gl.PushMatrix()
gl.LoadIdentity()
gl.Color4ub(0, 0, 0, 255)
gl.Begin(gl.QUADS)
gl.Vertex2d(x, y)
gl.Vertex2d(x+w+pad, y)
gl.Vertex2d(x+w+pad, y+h)
gl.Vertex2d(x, y+h)
gl.End()
gl.Translated(x+pad/2, y+pad/2, 0)
inventoryItemFont.Print(str)
gl.PopMatrix()
}
func (poly Polygon) Render() {
modes := [3]gl.GLenum{gl.LINE_LOOP, gl.POLYGON, gl.POINTS}
for i := range modes {
gl.Begin(modes[i])
last := len(poly) - 1
for i := range poly {
pt := poly[last-i]
gl.Vertex2d(pt.X, pt.Y)
}
gl.End()
}
}
func (world *World) Render(w, h, d float64) {
gl.PushMatrix()
gl.Scaled(w, h, d)
// Draw the goal
gl.Begin(gl.POINTS)
gl.Color3ub(255, 0, 0)
gl.PointSize(6)
gl.Vertex2d(world.goal.X, world.goal.Y)
gl.End()
// Draw the obstacles
gl.Color4ub(0, 0, 255, 63)
world.obstacles.Render()
// Draw the percept
gl.Color4ub(0, 255, 0, 127)
gl.LineWidth(1.5)
gl.Begin(gl.LINES)
for _, pt := range world.percept {
gl.Vertex2d(world.robot.X, world.robot.Y)
gl.Vertex2d(world.robot.X+pt.X, world.robot.Y+pt.Y)
}
gl.End()
// Draw the map
gl.Color3ub(0, 0, 255)
gl.LineWidth(2)
// FIXME
// Draw the robot
gl.Color3ub(0, 255, 0)
gl.PointSize(4)
gl.Begin(gl.POINTS)
gl.Vertex2d(world.robot.X, world.robot.Y)
gl.End()
gl.PopMatrix()
}
func (self *Inventory) DrawItemSlot(t int64, r Rect) {
gl.PushMatrix()
gl.LoadIdentity()
gl.Color4ub(16, 16, 16, 255)
gl.Begin(gl.QUADS)
gl.Vertex2d(r.x, r.y)
gl.Vertex2d(r.x+r.sizex, r.y)
gl.Vertex2d(r.x+r.sizex, r.y+r.sizey)
gl.Vertex2d(r.x, r.y+r.sizey)
gl.End()
gl.Color4ub(6, 6, 6, 255)
gl.Begin(gl.LINES)
gl.Vertex2d(r.x, r.y)
gl.Vertex2d(r.x+r.sizex, r.y)
gl.Vertex2d(r.x, r.y)
gl.Vertex2d(r.x, r.y+r.sizey)
gl.End()
gl.Color4ub(64, 64, 64, 255)
gl.Begin(gl.LINES)
gl.Vertex2d(r.x+r.sizex, r.y)
gl.Vertex2d(r.x+r.sizex, r.y+r.sizey)
gl.Vertex2d(r.x, r.y+r.sizey)
gl.Vertex2d(r.x+r.sizex, r.y+r.sizey)
gl.End()
gl.PopMatrix()
}
