func (pen *Pen) lineTo(p Point) {
gl.Enable(gl.BLEND)
gl.Enable(gl.POINT_SMOOTH)
gl.Enable(gl.LINE_SMOOTH)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Color4f(0.0, 0.0, 0.0, 0.1)
gl.Begin(gl.LINES)
for _, s := range pen.points {
if s.x == 0 && s.y == 0 {
continue
}
if p.distanceTo(s) < 20.0 {
gl.Vertex2i(int(p.x), int(p.y))
gl.Vertex2i(int(s.x), int(s.y))
}
}
gl.End()
pen.n = (pen.n + 1) % len(pen.points)
pen.points[pen.n] = p
pen.moveTo(p)
}
func (pen *Pen) lineTo(x, y int) {
gl.Enable(gl.BLEND)
gl.Enable(gl.POINT_SMOOTH)
gl.Enable(gl.LINE_SMOOTH)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Color4f(0.0, 0.0, 0.0, 0.1)
gl.Begin(gl.LINES)
var p [2]int
for i := range pen.points {
p = pen.points[i]
if p[0] == 0 && p[1] == 0 {
continue
}
if distanceTo(x, y, p[0], p[1]) < 10.0 {
gl.Vertex2i(x, y)
gl.Vertex2i(p[0], p[1])
}
}
gl.End()
pen.n = (pen.n + 1) % len(pen.points)
pen.points[pen.n][0] = x
pen.points[pen.n][1] = y
pen.moveTo(x, y)
}
func display() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.Begin(gl.TRIANGLES)
gl.Color3f(0.0, 0.0, 1.0) /* blue */
gl.Vertex2i(0, 0)
gl.Color3f(0.0, 1.0, 0.0) /* green */
gl.Vertex2i(200, 200)
gl.Color3f(1.0, 0.0, 0.0) /* red */
gl.Vertex2i(20, 200)
gl.End()
gl.Flush() /* Single buffered, so needs a flush. */
}
func drawQuad(x, y, w, h int, u, v, u2, v2 float32) {
gl.Begin(gl.QUADS)
gl.TexCoord2f(float32(u), float32(v))
gl.Vertex2i(int(x), int(y))
gl.TexCoord2f(float32(u2), float32(v))
gl.Vertex2i(int(x+w), int(y))
gl.TexCoord2f(float32(u2), float32(v2))
gl.Vertex2i(int(x+w), int(y+h))
gl.TexCoord2f(float32(u), float32(v2))
gl.Vertex2i(int(x), int(y+h))
gl.End()
}
func drawBlock(x, y int, color TetrisBlockColor) {
glx := gl.GLint(x)
gly := gl.GLint(y)
gl.Color3ub(color.R/2, color.G/2, color.B/2)
gl.Begin(gl.QUADS)
gl.Vertex2i(int(glx), int(gly))
gl.Vertex2i(int(glx+blockSize), int(gly))
gl.Vertex2i(int(glx+blockSize), int(gly+blockSize))
gl.Vertex2i(int(glx), int(gly+blockSize))
gl.Color3ub(color.R, color.G, color.B)
gl.Vertex2i(int(glx+smallBlockOffset), int(gly+smallBlockOffset))
gl.Vertex2i(int(glx+blockSize-smallBlockOffset), int(gly+smallBlockOffset))
gl.Vertex2i(int(glx+blockSize-smallBlockOffset), int(gly+blockSize-smallBlockOffset))
gl.Vertex2i(int(glx+smallBlockOffset), int(gly+blockSize-smallBlockOffset))
gl.End()
}
func drawSelection(p1, p2 Point) {
min, max := minMaxPoints(p1, p2)
gl.Color3ub(255, 0, 0)
gl.Begin(gl.LINES)
gl.Vertex2i(int(min.X), int(min.Y))
gl.Vertex2i(int(max.X), int(min.Y))
gl.Vertex2i(int(min.X), int(min.Y))
gl.Vertex2i(int(min.X), int(max.Y))
gl.Vertex2i(int(max.X), int(max.Y))
gl.Vertex2i(int(max.X), int(min.Y))
gl.Vertex2i(int(max.X), int(max.Y))
gl.Vertex2i(int(min.X), int(max.Y))
gl.End()
gl.Color3ub(255, 255, 255)
}
func (s *Sim) Draw() {
//start := time.Now()
// Init OpenGL
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.Enable(gl.BLEND)
gl.Enable(gl.POINT_SMOOTH)
gl.Enable(gl.LINE_SMOOTH)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Begin(gl.POINTS)
gl.PointSize(1)
for x := int(0); x < int(300); x += 1 {
for y := int(0); y < int(300); y += 1 {
pot := s.potential(s.units[0], float64(x), float64(y))
//r := math.Min(pot*2, 1)
//g := math.Min(pot*2, 2)-1
gl.Color4f(1-float32(pot), 1-float32(pot), 1-float32(pot), 1)
gl.Vertex2i(x, y)
}
}
gl.End()
// Draw Units
gl.Begin(gl.POINTS)
for i, unit := range s.units {
if i == 0 {
gl.Color4f(1, 0, 0, 1)
fmt.Println(unit.pos.X)
} else {
gl.Color4f(0, 1, 0, 1)
}
gl.Vertex2f(float32(unit.pos.X), float32(unit.pos.Y))
}
gl.End()
// Nav mesh
/*
for e := s.nav.nodes.Front(); e != nil; e = e.Next() {
nn := e.Value.(*NavNode)
gl.Color4f(0, 0, 1, 0.2)
if s.markedNodes[nn] {
gl.Color4f(1, 0, 0, 0.2)
}
gl.Begin(gl.POLYGON)
for _, pos := range nn.node.Points {
if pos == nil {
continue
}
gl.Vertex2f(float32(pos.X), float32(pos.Y))
}
gl.End()
gl.Color4f(0, 0, 1, 1)
gl.Begin(gl.LINE_LOOP)
for _, pos := range nn.node.Points {
if pos == nil {
continue
}
gl.Vertex2f(float32(pos.X), float32(pos.Y))
}
gl.End()
}
*/
// Draw Path
if s.units[0].path != nil {
gl.Begin(gl.LINE_STRIP)
gl.Color4f(1, 0, 0, 0.2)
for e := s.units[0].path.Front(); e != nil; e = e.Next() {
pos := e.Value.(*geo.Vec)
gl.Vertex2f(float32(pos.X), float32(pos.Y))
}
gl.End()
}
// Draw Links
/*gl.Color4f(1, 0, 0, 1)
gl.Begin(gl.LINES)
for i, link := range nn.links {
pt1 := nn.node.Points[i]
pt2 := nn.node.Points[(i+1)%nn.node.Len()]
lineCenter := &geo.Vec{(pt1.X+pt2.X)/2, (pt1.Y+pt2.Y)/2}
center := link.node.Center()
gl.Vertex2d(lineCenter.X, lineCenter.Y)
gl.Vertex2d(center.X, center.Y)
}
gl.End()*/
/*
fps := 1/(float64(time.Since(start))/float64(time.Second))
s.ui.fpsLabel2.SetLabel(fmt.Sprintf("%f", fps))
*/
}