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()
}
func drawShip(angle float32) {
gl.PushMatrix()
gl.Translatef(x, y, 0.0)
gl.Rotatef(angle, 0.0, 0.0, 1.0)
if thrust {
gl.Color3f(1.0, 0.0, 0.0)
gl.Begin(gl.LINE_STRIP)
gl.Vertex2f(-0.75, -0.5)
gl.Vertex2f(-1.75, 0)
gl.Vertex2f(-0.75, 0.5)
gl.End()
}
gl.Color3f(1.0, 1.0, 0.0)
gl.Begin(gl.LINE_LOOP)
gl.Vertex2f(2.0, 0.0)
gl.Vertex2f(-1.0, -1.0)
gl.Vertex2f(-0.5, 0.0)
gl.Vertex2f(-1.0, 1.0)
gl.Vertex2f(2.0, 0.0)
gl.End()
if shield {
gl.Color3f(0.1, 0.1, 1.0)
gl.Begin(gl.LINE_LOOP)
for rad := 0.0; rad < 12.0; rad += 1.0 {
gl.Vertex2f(
float32(2.3*math.Cos(2*float64(rad)/math.Pi)+0.2),
float32(2.0*math.Sin(2*float64(rad)/math.Pi)))
}
gl.End()
}
gl.PopMatrix()
}
func (f frame) Render(w, h, d float64) {
// Draw a wireframe around the arena
gl.Color4ub(255, 255, 255, 31)
gl.LineWidth(2.0)
gl.Begin(gl.LINE_STRIP)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(w, 0, 0)
gl.Vertex3d(w, h, 0)
gl.Vertex3d(0, h, 0)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(0, 0, d)
gl.Vertex3d(0, h, d)
gl.Vertex3d(w, h, d)
gl.Vertex3d(w, 0, d)
gl.Vertex3d(0, 0, d)
gl.End()
gl.Begin(gl.LINES)
gl.Vertex3d(0, h, 0)
gl.Vertex3d(0, h, d)
gl.Vertex3d(w, 0, 0)
gl.Vertex3d(w, 0, d)
gl.Vertex3d(w, h, 0)
gl.Vertex3d(w, h, d)
gl.End()
// Render the page.
if f.renderer != nil {
f.renderer.Render(w, h, d)
}
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(-1.5, 0, -6)
gl.Rotatef(trisAngle, 0, 1, 0)
gl.Begin(gl.TRIANGLES)
gl.Color3f(1, 0, 0)
gl.Vertex3f(0, 1, 0)
gl.Color3f(0, 1, 0)
gl.Vertex3f(-1, -1, 0)
gl.Color3f(0, 0, 1)
gl.Vertex3f(1, -1, 0)
gl.End()
gl.LoadIdentity()
gl.Translatef(1.5, 0, -6)
gl.Rotatef(quadAngle, 1, 0, 0)
gl.Color3f(0.5, 0.5, 1.0)
gl.Begin(gl.QUADS)
gl.Vertex3f(-1, 1, 0)
gl.Vertex3f(1, 1, 0)
gl.Vertex3f(1, -1, 0)
gl.Vertex3f(-1, -1, 0)
gl.End()
trisAngle += 0.2
quadAngle -= 0.15
glfw.SwapBuffers()
}
// Here goes our drawing code
func drawGLScene() {
// Clear the screen and depth buffer
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// Move left 1.5 units and into the screen 6.0 units.
gl.LoadIdentity()
gl.Translatef(-1.5, 0.0, -6.0)
gl.Rotatef(float32(rtri), 0.0, 1.0, 0.0) // Rotate the triangle on the Y axis
gl.Begin(gl.TRIANGLES) // Draw triangles
gl.Color3f(1.0, 0.0, 0.0) // Set The Color To Red
gl.Vertex3f(0.0, 1.0, 0.0) // top
gl.Color3f(0.0, 1.0, 0.0) // Set The Color To Red
gl.Vertex3f(-1.0, -1.0, 0.0) // bottom left
gl.Color3f(0.0, 0.0, 1.0) // Set The Color To Red
gl.Vertex3f(1.0, -1.0, 0.0) // bottom right
gl.End() // finish drawing the triangle
// Move right 3 units
gl.LoadIdentity()
gl.Translatef(1.5, 0.0, -6.0)
gl.Color3f(0.5, 0.5, 1.0) // Set The Color To Blue One Time Only
gl.Rotatef(float32(rquad), 1.0, 0.0, 0.0) // rotate the quad on the X axis
gl.Begin(gl.QUADS) // draw quads
gl.Vertex3f(-1.0, 1.0, 0.0) // top left
gl.Vertex3f(1.0, 1.0, 0.0) // top right
gl.Vertex3f(1.0, -1.0, 0.0) // bottom right
gl.Vertex3f(-1.0, -1.0, 0.0) // bottom left
gl.End() // done drawing the quad
// Draw to the screen
sdl.GL_SwapBuffers()
rtri += 0.2 // Increase The Rotation Variable For The Triangle
rquad -= 0.15 // Decrease The Rotation Variable For The Quad
// Gather our frames per second
frames++
t := sdl.GetTicks()
if t-t0 >= 5000 {
seconds := (t - t0) / 1000.0
fps := frames / seconds
fmt.Println(frames, "frames in", seconds, "seconds =", fps, "FPS")
t0 = t
frames = 0
}
}
func (pp Points) Render() {
gl.Begin(gl.POINTS)
for _, p := range pp {
gl.Vertex2d(p.X, p.Y)
}
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 (self *Pause) Draw(t int64) {
gl.MatrixMode(gl.MODELVIEW)
gl.PushMatrix()
gl.LoadIdentity()
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.LIGHTING)
gl.Disable(gl.LIGHT0)
gl.Disable(gl.LIGHT1)
gl.Color4ub(0, 0, 0, 240)
gl.Begin(gl.QUADS)
gl.Vertex2f(float32(viewport.lplane), float32(viewport.bplane))
gl.Vertex2f(float32(viewport.rplane), float32(viewport.bplane))
gl.Vertex2f(float32(viewport.rplane), float32(viewport.tplane))
gl.Vertex2f(float32(viewport.lplane), float32(viewport.tplane))
gl.End()
str := "paused"
h, w := pauseFont.Measure(str)
// x := (viewport.rplane - viewport.lplane - w) / 2
// y := (viewport.tplane - viewport.bplane - h) / 2
gl.Translated(-w/2, -h/2, 0)
pauseFont.Print(str)
gl.PopMatrix()
}
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 (s *Sprite) Draw(x, y, angle, scale float32, blend bool) {
gl.Enable(gl.TEXTURE_2D)
gl.Disable(gl.COLOR_MATERIAL)
if blend {
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.BLEND)
} else {
gl.Disable(gl.BLEND)
gl.BlendFunc(gl.ONE, gl.ZERO)
}
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
gl.Translatef(x, y, 0)
gl.Rotatef(angle*360/(2*math.Pi), 0, 0, 1)
gl.Scalef(scale, scale, 1)
s.tex.Bind(gl.TEXTURE_2D)
gl.Begin(gl.QUADS)
gl.Color3f(1, 1, 1)
gl.TexCoord2d(0, 0)
gl.Vertex3f(-0.5*s.width, -0.5*s.height, 0)
gl.TexCoord2d(1, 0)
gl.Vertex3f(0.5*s.width, -0.5*s.height, 0)
gl.TexCoord2d(1, 1)
gl.Vertex3f(0.5*s.width, 0.5*s.height, 0)
gl.TexCoord2d(0, 1)
gl.Vertex3f(-0.5*s.width, 0.5*s.height, 0)
gl.End()
gl.Disable(gl.TEXTURE_2D)
gl.Disable(gl.BLEND)
}
func (self *Picker) Draw(t int64) {
gl.MatrixMode(gl.MODELVIEW)
gl.PushMatrix()
gl.LoadIdentity()
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.LIGHTING)
gl.Disable(gl.LIGHT0)
gl.Disable(gl.LIGHT1)
gl.Begin(gl.TRIANGLE_FAN)
gl.Color4ub(0, 0, 0, 128)
gl.Vertex2f(self.x, self.y)
for angle := float64(0); angle <= 2*math.Pi; angle += math.Pi / 2 / 10 {
gl.Vertex2f(self.x-float32(math.Sin(angle))*self.radius, self.y+float32(math.Cos(angle))*self.radius)
}
gl.End()
self.DrawItemHighlight(t, ThePlayer.currentAction)
self.DrawPlayerItems(t, true)
gl.PopMatrix()
}
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 (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 drawLine(x1, y1, x2, y2 float64) {
gl.Begin(gl.LINES)
gl.Vertex2d(x1, y1)
gl.Vertex2d(x2, y2)
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()
}
// Render the mesh
// The V array must be a multiple of 3 since it uses triangles to render the mesh.
// If two or more triangles share the same edge the user can pass the same pointer twice
func (m *Mesh) Render() {
count := 0
gl.Begin(gl.TRIANGLES)
for _, v := range m.V {
if count%3 == 0 && count > 0 {
gl.End()
gl.Begin(gl.TRIANGLES)
count = 0
}
gl.Color3f(1, 0, 0)
gl.Vertex3f(v.X, v.Y, v.Z)
count++
}
if count > 0 {
gl.End()
}
}
func (self *Console) Draw(t int64) {
gl.MatrixMode(gl.MODELVIEW)
gl.PushMatrix()
gl.LoadIdentity()
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.LIGHTING)
gl.Disable(gl.LIGHT0)
gl.Disable(gl.LIGHT1)
h := float32(consoleFont.height) * PIXEL_SCALE
margin := float32(3.0) * PIXEL_SCALE
consoleHeight := 3 * h
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
gl.Color4ub(0, 0, 0, 208)
gl.Begin(gl.QUADS)
gl.Vertex2f(float32(viewport.lplane), float32(viewport.bplane)+consoleHeight+margin*2) // Bottom Left Of The Texture and Quad
gl.Vertex2f(float32(viewport.rplane), float32(viewport.bplane)+consoleHeight+margin*2) // Bottom Right Of The Texture and Quad
gl.Vertex2f(float32(viewport.rplane), float32(viewport.bplane)) // Top Right Of The Texture and Quad
gl.Vertex2f(float32(viewport.lplane), float32(viewport.bplane)) // Top Left Of The Texture and Quad
gl.End()
gl.Translatef(float32(viewport.lplane)+margin, float32(viewport.bplane)+consoleHeight+margin-h, 0)
consoleFont.Print(fmt.Sprintf("FPS: %5.2f V: %d (%d) CH: %d M: %d", self.fps, self.vertices, self.culledVertices, len(TheWorld.chunks), len(TheWorld.mobs)))
gl.LoadIdentity()
gl.Translatef(float32(viewport.lplane)+margin, float32(viewport.bplane)+consoleHeight+margin-2*h, 0)
consoleFont.Print(fmt.Sprintf("X: %5.2f Y: %4.2f Z: %5.2f H: %5.2f (%s) D: %0.1f (%d)", ThePlayer.position[XAXIS], ThePlayer.position[YAXIS], ThePlayer.position[ZAXIS], ThePlayer.heading, HeadingToCompass(ThePlayer.heading), ThePlayer.distanceTravelled, ThePlayer.distanceFromStart))
gl.LoadIdentity()
gl.Translatef(float32(viewport.lplane)+margin, float32(viewport.bplane)+consoleHeight+margin-3*h, 0)
numgc := uint32(0)
avggc := float64(0)
var last3 [3]float64
if self.mem.NumGC > 3 {
numgc = self.mem.NumGC
avggc = float64(self.mem.PauseTotalNs) / float64(self.mem.NumGC) / 1e6
index := int(numgc) - 1
if index > 255 {
index = 255
}
last3[0] = float64(self.mem.PauseNs[index]) / 1e6
last3[1] = float64(self.mem.PauseNs[index-1]) / 1e6
last3[2] = float64(self.mem.PauseNs[index-2]) / 1e6
}
consoleFont.Print(fmt.Sprintf("Mem: %.1f/%.1f GC: %.1fms [%d: %.1f, %.1f, %.1f] ChGen: %.1fms | Sc: %.1f TOD: %.1f", float64(self.mem.Alloc)/(1024*1024), float64(self.mem.Sys)/(1024*1024), avggc, numgc, last3[0], last3[1], last3[2], float64(self.chunkGenerationTime)/1e6, viewport.scale, timeOfDay))
gl.PopMatrix()
}
// Draw unit vectors at the origin.
// The X vector is red, Y is green, and Z is blue.
func drawOrigin() {
gl.Color3ub(0xff, 0, 0)
gl.Begin(gl.LINES)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(1, 0, 0)
gl.End()
gl.Color3ub(0, 0xff, 0)
gl.Begin(gl.LINES)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(0, 1, 0)
gl.End()
gl.Color3ub(0, 0, 0xff)
gl.Begin(gl.LINES)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(0, 0, 1)
gl.End()
}
func drawBullets() {
gl.Begin(gl.POINTS)
gl.Color3f(1.0, 0.0, 1.0)
for i := 0; i < MAX_BULLETS; i++ {
if bullet[i].inuse {
gl.Vertex2f(bullet[i].x, bullet[i].y)
}
}
gl.End()
}
func display() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
positionCamera()
gl.Begin(gl.QUADS)
drawTerrain()
gl.End()
gl.Flush()
}
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 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 (t *Skybox) RenderScaled(center, scale *Vec3) {
v := []*Vec3{
V3(-1, -1, 1),
V3(1, -1, 1),
V3(1, 1, 1),
V3(-1, 1, 1),
V3(-1, -1, -1),
V3(1, -1, -1),
V3(1, 1, -1),
V3(-1, 1, -1)}
for i := 0; i < 8; i++ {
v[i].Muli(scale).Addi(center)
}
if globals.UseShader {
program.Unuse()
}
//*//save attributes and change them
gl.PushAttrib(gl.ENABLE_BIT | gl.TEXTURE_BIT)
defer gl.PopAttrib() //reset to old attributes
gl.Enable(gl.TEXTURE_2D)
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.LIGHTING)
gl.Disable(gl.BLEND) //*/
oneSide := func(tex *texture.Texture, a, b, c, d int, n *Vec3) {
tex.BindForSkybox(color.White)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.Begin(gl.TRIANGLES)
gl.Normal3dv(n.Slc())
gl.TexCoord2i(0, 0)
gl.Vertex3dv(v[a].Slc())
gl.TexCoord2i(1, 0)
gl.Vertex3dv(v[b].Slc())
gl.TexCoord2i(1, 1)
gl.Vertex3dv(v[c].Slc())
gl.TexCoord2i(0, 0)
gl.Vertex3dv(v[a].Slc())
gl.TexCoord2i(1, 1)
gl.Vertex3dv(v[c].Slc())
gl.TexCoord2i(0, 1)
gl.Vertex3dv(v[d].Slc())
gl.End()
}
oneSide(t.up, 2, 3, 7, 6, V3(0, -1, 0))
oneSide(t.dn, 5, 4, 0, 1, V3(0, 1, 0))
oneSide(t.lt, 5, 1, 2, 6, V3(1, 0, 0))
oneSide(t.rt, 0, 4, 7, 3, V3(-1, 0, 0))
oneSide(t.ft, 1, 0, 3, 2, V3(0, 0, -1))
oneSide(t.bk, 4, 5, 6, 7, V3(0, 0, 1))
}
func renderTile(x, y float32, tex *gl.Texture) {
tex.Bind(gl.TEXTURE_2D)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0, 0)
gl.Vertex2f(x, y)
gl.TexCoord2f(1, 0)
gl.Vertex2f(x+1, y)
gl.TexCoord2f(1, 1)
gl.Vertex2f(x+1, y+1)
gl.TexCoord2f(0, 1)
gl.Vertex2f(x, y+1)
gl.End()
}
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 (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 drawTexRect(tex *texture.Texture, a, b *Vec2) {
tex.Bind()
gl.Begin(gl.QUADS)
gl.TexCoord2i(0, 0)
a.Gl()
gl.TexCoord2i(1, 0)
V2(b.X, a.Y).Gl()
gl.TexCoord2i(1, 1)
b.Gl()
gl.TexCoord2i(0, 1)
V2(a.X, b.Y).Gl()
gl.End()
}
func (this *Cursor) Draw(w, h Double, col *color24.Color24) {
var p = this.Pos.Mul(V2(w, h))
var a = p.Add(V2(-10, -10))
var b = p.Add(V2(10, -10))
gl.Disable(gl.TEXTURE_2D)
col.Gl()
gl.Begin(gl.TRIANGLES)
p.Gl()
a.Gl()
b.Gl()
gl.End()
gl.Enable(gl.TEXTURE_2D)
}
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)
}
// Here goes our drawing code
func drawGLScene() {
// Clear the screen and depth buffer
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// Move left 1.5 units and into the screen 6.0 units.
gl.LoadIdentity()
gl.Translatef(-1.5, 0.0, -6.0)
gl.Begin(gl.TRIANGLES) // Draw triangles
gl.Vertex3f(0.0, 1.0, 0.0) // top
gl.Vertex3f(-1.0, -1.0, 0.0) // bottom left
gl.Vertex3f(1.0, -1.0, 0.0) // bottom right
gl.End() // finish drawing the triangle
// Move right 3 units
gl.Translatef(3.0, 0.0, 0.0)
gl.Begin(gl.QUADS) // draw quads
gl.Vertex3f(-1.0, 1.0, 0.0) // top left
gl.Vertex3f(1.0, 1.0, 0.0) // top right
gl.Vertex3f(1.0, -1.0, 0.0) // bottom right
gl.Vertex3f(-1.0, -1.0, 0.0) // bottom left
gl.End() // done drawing the quad
// Draw to the screen
sdl.GL_SwapBuffers()
// Gather our frames per second
frames++
t := sdl.GetTicks()
if t-t0 >= 5000 {
seconds := (t - t0) / 1000.0
fps := frames / seconds
fmt.Println(frames, "frames in", seconds, "seconds =", fps, "FPS")
t0 = t
frames = 0
}
}