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 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()
}
func main() {
var err error
if err = glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.Terminate()
// Open window with FSAA samples (if possible).
glfw.OpenWindowHint(glfw.FsaaSamples, 4)
if err = glfw.OpenWindow(400, 400, 0, 0, 0, 0, 0, 0, glfw.Windowed); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetWindowTitle("Aliasing Detector")
glfw.SetSwapInterval(1)
if samples := glfw.WindowParam(glfw.FsaaSamples); samples != 0 {
fmt.Fprintf(os.Stdout, "Context reports FSAA is supported with %d samples\n", samples)
} else {
fmt.Fprintf(os.Stdout, "Context reports FSAA is unsupported\n")
}
gl.MatrixMode(gl.PROJECTION)
glu.Perspective(0, 1, 0, 1)
for glfw.WindowParam(glfw.Opened) == 1 {
time := float32(glfw.Time())
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(0.5, 0, 0)
gl.Rotatef(time, 0, 0, 1)
gl.Enable(GL_MULTISAMPLE_ARB)
gl.Color3f(1, 1, 1)
gl.Rectf(-0.25, -0.25, 0.25, 0.25)
gl.LoadIdentity()
gl.Translatef(-0.5, 0, 0)
gl.Rotatef(time, 0, 0, 1)
gl.Disable(GL_MULTISAMPLE_ARB)
gl.Color3f(1, 1, 1)
gl.Rectf(-0.25, -0.25, 0.25, 0.25)
glfw.SwapBuffers()
}
}
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. */
}
// 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
}
}
// Render stuff
func Draw() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(-1.5, 0, -6)
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()
glfw.SwapBuffers()
}
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 Draw() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.PushMatrix()
defer gl.PopMatrix()
gl.Color4f(0, 1, 0, .5)
DrawCircle(vect.Vect{ScreenSize.X / 2, ScreenSize.Y / 2}, ScreenSize.Y/2.0-5.0, false)
if Settings.Paused {
gl.Color3f(1, 1, 1)
RenderFontAt("Paused", 20, 30)
}
//draw collision objects
gl.PushMatrix()
gl.Translated(ScreenSize.X/2, ScreenSize.Y/2, 0)
gl.Scaled(Settings.Scale, Settings.Scale, 1)
DrawDebugData(space)
gl.PopMatrix()
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(0, 0, -20+globalState.MousePos.Z*globalState.speed)
gl.Rotatef(globalState.Rot.X, 1, 0, 0)
gl.Rotatef(globalState.Rot.Y, 0, 1, 0)
gl.Rotatef(globalState.Rot.Z, 0, 0, 1)
if globalState.speed != 1 {
gl.Scalef(globalState.speed, globalState.speed, globalState.speed)
}
gl.RenderMode(gl.RENDER)
gl.Begin(gl.QUADS)
for i, _ := range mesh.Faces {
if colors, ok := faceColor[i]; ok {
gl.Color3f(colors[0], colors[1], colors[2])
} else {
faceColor[i] = make([]float32, 3)
faceColor[i][0] = rand.Float32()
faceColor[i][1] = rand.Float32()
faceColor[i][2] = rand.Float32()
gl.Color3f(faceColor[i][0], faceColor[i][1], faceColor[i][2])
}
face := &mesh.Faces[i]
for j, _ := range face.Vertices {
var v *wfobj.Vertex
if len(face.Normals) > 0 {
v = &face.Normals[j]
gl.Normal3f(v.X, v.Y, v.Z)
}
v = &face.Vertices[j]
gl.Vertex3f(v.X, v.Y, v.Z)
}
}
gl.End()
gl.Finish()
gl.Flush()
sdl.GL_SwapBuffers()
}
func DrawDebugData(space *collision.Space) {
//Draw shapes
for _, b := range space.Bodies {
if b.Enabled == false {
//Inactive
gl.Color3f(.5, .8, .5)
} else if b.IsStatic() {
//Static
gl.Color3f(1, 1, 1)
} else {
//Normal
gl.Color3f(1, 0, 0)
}
for _, s := range b.Shapes {
DrawShape(s)
}
}
gl.Color3f(0, 1, 0.5)
for _, b := range space.Bodies {
DrawTransform(&b.Transform, 0.2)
}
if Settings.DrawAABBs {
for _, b := range space.Bodies {
gl.Color3f(.3, .7, .7)
for _, s := range b.Shapes {
DrawQuad(s.AABB.Lower, s.AABB.Upper, false)
}
}
}
const contactRadius = 0.2
const contactNormalScale = 0.5
for arb := space.ContactManager.ArbiterList.Arbiter; arb != nil; arb = arb.Next {
for i := 0; i < arb.NumContacts; i++ {
con := arb.Contacts[i]
gl.Color3f(0, 0, 1)
p1 := con.Position
p2 := vect.Add(p1, vect.Mult(con.Normal, contactNormalScale))
//p2 := vect.Add(p1, vect.Mult(con.Normal, con.Separation))
DrawLine(p1, p2)
gl.Color3f(0, 1, 0)
DrawCircle(con.Position, contactRadius, false)
}
}
if Settings.DrawTreeNodes {
for _, node := range space.GetDynamicTreeNodes() {
gl.Color3f(0.0, .7, .7)
DrawQuad(node.AABB().Lower, node.AABB().Upper, false)
}
}
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
gl.Color3f(1, 1, 1)
drawShapes(space)
glfw.SwapBuffers()
}
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 main() {
glut.InitDisplayMode(glut.SINGLE | glut.RGB)
glut.InitWindowSize(465, 250)
glut.CreateWindow("GLUT bitmap & stroke font example")
gl.ClearColor(1.0, 1.0, 1.0, 1.0)
gl.Color3f(0, 0, 0)
gl.LineWidth(3.0)
glut.DisplayFunc(display)
glut.ReshapeFunc(reshape)
glut.MainLoop()
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// Food
for coord, _ := range food {
gl.LoadIdentity()
gl.Scalef(0.05, 0.05, 1)
gl.Translatef(float32(coord.x)-5, float32(coord.y)-5, -1)
gl.Begin(gl.QUADS)
gl.Color3f(0.5, float32(coord.x)/10, float32(coord.y)/10)
gl.Vertex3f(0.25, 0.75, 0)
gl.Vertex3f(0.75, 0.75, 0)
gl.Color3f(0.3, float32(coord.x)/10-0.2, float32(coord.y)/10-0.2)
gl.Vertex3f(0.75, 0.25, 0)
gl.Vertex3f(0.25, 0.25, 0)
gl.End()
}
//Snake
for _, coord := range snake.coords {
gl.LoadIdentity()
gl.Scalef(0.05, 0.05, 1)
gl.Translatef(float32(coord.x)-5, float32(coord.y)-5, -1)
gl.Begin(gl.QUADS)
gl.Color3f(float32(coord.y)/10, float32(coord.x)/10, 0.5)
gl.Vertex3f(0, 1, 0)
gl.Vertex3f(1, 1, 0)
gl.Color3f(float32(coord.y)/10-0.2, float32(coord.x)/10-0.2, 0.3)
gl.Vertex3f(1, 0, 0)
gl.Vertex3f(0, 0, 0)
gl.End()
}
glfw.SwapBuffers()
}
// 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 drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(1.5, 0, -6)
gl.Rotatef(quadAngle, 1, 1, 1)
gl.Begin(gl.QUADS)
for i, _ := range mesh.Faces {
gl.Color3f(rand.Float32(), rand.Float32(), rand.Float32())
face := &mesh.Faces[i]
for j, _ := range face.Vertices {
v := &face.Vertices[j]
gl.Vertex3f(v.X, v.Y, v.Z)
}
}
gl.End()
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) /* Red */
gl.Vertex3f(0.0, 1.0, 0.0) /* Top Of Triangle (Front) */
gl.Color3f(0.0, 1.0, 0.0) /* Green */
gl.Vertex3f(-1.0, -1.0, 1.0) /* Left Of Triangle (Front) */
gl.Color3f(0.0, 0.0, 1.0) /* Blue */
gl.Vertex3f(1.0, -1.0, 1.0) /* Right Of Triangle (Front) */
gl.Color3f(1.0, 0.0, 0.0) /* Red */
gl.Vertex3f(0.0, 1.0, 0.0) /* Top Of Triangle (Right) */
gl.Color3f(0.0, 0.0, 1.0) /* Blue */
gl.Vertex3f(1.0, -1.0, 1.0) /* Left Of Triangle (Right) */
gl.Color3f(0.0, 1.0, 0.0) /* Green */
gl.Vertex3f(1.0, -1.0, -1.0) /* Right Of Triangle (Right) */
gl.Color3f(1.0, 0.0, 0.0) /* Red */
gl.Vertex3f(0.0, 1.0, 0.0) /* Top Of Triangle (Back) */
gl.Color3f(0.0, 1.0, 0.0) /* Green */
gl.Vertex3f(1.0, -1.0, -1.0) /* Left Of Triangle (Back) */
gl.Color3f(0.0, 0.0, 1.0) /* Blue */
gl.Vertex3f(-1.0, -1.0, -1.0) /* Right Of Triangle (Back) */
gl.Color3f(1.0, 0.0, 0.0) /* Red */
gl.Vertex3f(0.0, 1.0, 0.0) /* Top Of Triangle (Left) */
gl.Color3f(0.0, 0.0, 1.0) /* Blue */
gl.Vertex3f(-1.0, -1.0, -1.0) /* Left Of Triangle (Left) */
gl.Color3f(0.0, 1.0, 0.0) /* Green */
gl.Vertex3f(-1.0, -1.0, 1.0) /* Right Of Triangle (Left) */
gl.End() // finish drawing the triangle
// Move right 3 units
gl.LoadIdentity()
gl.Translatef(1.5, 0.0, -7.0)
gl.Rotatef(float32(rquad), 1.0, 1.0, 1.0) // rotate the quad on the X axis
gl.Begin(gl.QUADS) // draw quads
gl.Color3f(0.0, 1.0, 0.0) // Set The Color To Green
gl.Vertex3f(1.0, 1.0, -1.0) // Top Right Of The Quad (Top)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top Left Of The Quad (Top)
gl.Vertex3f(-1.0, 1.0, 1.0) // Bottom Left Of The Quad (Top)
gl.Vertex3f(1.0, 1.0, 1.0) // Bottom Right Of The Quad (Top)
gl.Color3f(1.0, 0.5, 0.0) // Set The Color To Orange
gl.Vertex3f(1.0, -1.0, 1.0) // Top Right Of The Quad (Bottom)
gl.Vertex3f(-1.0, -1.0, 1.0) // Top Left Of The Quad (Bottom)
gl.Vertex3f(-1.0, -1.0, -1.0) // Bottom Left Of The Quad (Bottom)
gl.Vertex3f(1.0, -1.0, -1.0) // Bottom Right Of The Quad (Bottom)
gl.Color3f(1.0, 0.0, 0.0) // Set The Color To Red
gl.Vertex3f(1.0, 1.0, 1.0) // Top Right Of The Quad (Front)
gl.Vertex3f(-1.0, 1.0, 1.0) // Top Left Of The Quad (Front)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom Left Of The Quad (Front)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom Right Of The Quad (Front)
gl.Color3f(1.0, 1.0, 0.0) // Set The Color To Yellow
gl.Vertex3f(1.0, -1.0, -1.0) // Bottom Left Of The Quad (Back)
gl.Vertex3f(-1.0, -1.0, -1.0) // Bottom Right Of The Quad (Back)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top Right Of The Quad (Back)
gl.Vertex3f(1.0, 1.0, -1.0) // Top Left Of The Quad (Back)
gl.Color3f(0.0, 0.0, 1.0) // Set The Color To Blue
gl.Vertex3f(-1.0, 1.0, 1.0) // Top Right Of The Quad (Left)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top Left Of The Quad (Left)
gl.Vertex3f(-1.0, -1.0, -1.0) // Bottom Left Of The Quad (Left)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom Right Of The Quad (Left)
gl.Color3f(1.0, 0.0, 1.0) // Set The Color To Violet
gl.Vertex3f(1.0, 1.0, -1.0) // Top Right Of The Quad (Right)
gl.Vertex3f(1.0, 1.0, 1.0) // Top Left Of The Quad (Right)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom Left Of The Quad (Right)
gl.Vertex3f(1.0, -1.0, -1.0) // Bottom Right Of The Quad (Right)
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
}
}