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 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 (s sprite) render() {
gl.Translatef(float32(s.X), float32(s.Y), float32(s.Z))
gl.Rotatef(90.0, 1.0, 0.0, 0.0)
s.tex.Bind(gl.TEXTURE_2D)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-s.width/2.0, -s.height/2.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(s.width/2.0, -s.height/2.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(s.width/2.0, s.height/2.0, 0.0)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-s.width/2.0, s.height/2.0, 0.0)
gl.End()
s.tex.Unbind(gl.TEXTURE_2D)
}
func (v *Video) Render() {
for running {
select {
case dimensions := <-v.resize:
v.ResizeEvent(dimensions[0], dimensions[1])
case val := <-v.tick:
slice := make([]uint8, len(val)*3)
for i := 0; i < len(val); i = i + 1 {
slice[i*3+0] = (uint8)((val[i] >> 16) & 0xff)
slice[i*3+1] = (uint8)((val[i] >> 8) & 0xff)
slice[i*3+2] = (uint8)((val[i]) & 0xff)
}
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
v.tex.Bind(gl.TEXTURE_2D)
if ppu.OverscanEnabled {
gl.TexImage2D(gl.TEXTURE_2D, 0, 3, 240, 224, 0, gl.RGB, gl.UNSIGNED_BYTE, slice)
} else {
gl.TexImage2D(gl.TEXTURE_2D, 0, 3, 256, 240, 0, gl.RGB, gl.UNSIGNED_BYTE, slice)
}
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, 1.0, 0.0)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, 1.0, 0.0)
gl.End()
if v.screen != nil {
sdl.GL_SwapBuffers()
v.fpsmanager.FramerateDelay()
}
}
}
}
func draw() {
for y := 0; y < Size; y++ {
for x := 0; x < Size; x++ {
var color uint8
if grid.Front()[y][x] {
color = 0x00
} else {
color = 0xFF
}
pixels[(y*Size+x)*3+0] = color
pixels[(y*Size+x)*3+1] = color
pixels[(y*Size+x)*3+2] = color
}
}
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.TexImage2D(gl.TEXTURE_2D, 0, 3, Size, Size, 0, gl.RGB, gl.UNSIGNED_BYTE, pixels)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, 1.0, 0.0)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, 1.0, 0.0)
gl.End()
glfw.SwapBuffers()
}
// Function GLDraw draws the model into the current GL scene. It assumes that the context is already
// set up, including any translation and rotation.
func (model *Model) GLDraw() {
var a, b, c float32
var v *Vertex
// Start drawing triangles
gl.Begin(gl.TRIANGLES)
for _, triangle := range model.triangles {
triangleNormals := triangle.TriangleNormals()
textureCoordinates := triangle.TextureCoordinates()
// Set the normal. Assume it's a flat triangle (the normals at all 3 vertices are equal)
a, b, c = triangleNormals.Vertex1Normal()
gl.Normal3f(a, b, c)
// Vertex 1
a, b = textureCoordinates.Vertex1Coord()
gl.TexCoord2f(a, b)
v = triangle.Vertex1()
gl.Vertex3f(v.X(), v.Y(), v.Z())
// Vertex 2
a, b = textureCoordinates.Vertex2Coord()
gl.TexCoord2f(a, b)
v = triangle.Vertex2()
gl.Vertex3f(v.X(), v.Y(), v.Z())
// Vertex 3
a, b = textureCoordinates.Vertex3Coord()
gl.TexCoord2f(a, b)
v = triangle.Vertex3()
gl.Vertex3f(v.X(), v.Y(), v.Z())
}
// Finish
gl.End()
}
func (v *Video) Render() {
runtime.LockOSThread()
for running {
select {
case val := <-v.tick:
slice := make([]uint8, len(val)*3)
for i := 0; i < len(val); i = i + 1 {
slice[i*3+0] = (uint8)((val[i] >> 16) & 0xff)
slice[i*3+1] = (uint8)((val[i] >> 8) & 0xff)
slice[i*3+2] = (uint8)((val[i]) & 0xff)
}
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
v.tex.Bind(gl.TEXTURE_2D)
gl.TexImage2D(gl.TEXTURE_2D, 0, 3, 256, 240, 0, gl.RGB, gl.UNSIGNED_BYTE, slice)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, 1.0, 0.0)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, 1.0, 0.0)
gl.End()
glfw.SwapBuffers()
v.fpsmanager.FramerateDelay()
}
}
}
// Here goes our drawing code
func drawGLScene(sector Sector) {
xtrans := gl.GLfloat(-xpos)
ztrans := gl.GLfloat(-zpos)
ytrans := gl.GLfloat(-walkbias - 0.25)
scenroty := gl.GLfloat(360.0 - yrot)
// Clear the screen and depth buffer
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// reset the view
gl.LoadIdentity()
// Rotate up and down to look up and down
gl.Rotatef(float32(lookupdown), 1.0, 0.0, 0.0)
// Rotate depending on direction player is facing
gl.Rotatef(float32(scenroty), 0.0, 1.0, 0.0)
// translate the scene based on player position
gl.Translatef(float32(xtrans), float32(ytrans), float32(ztrans))
gl.BindTexture(gl.TEXTURE_2D, uint(textures[filter]))
for _, vertices := range sector {
gl.Begin(gl.TRIANGLES)
for _, triangle := range *vertices {
gl.Normal3f(0.0, 0.0, 1.0)
gl.TexCoord2f(float32(triangle.u), float32(triangle.v))
gl.Vertex3f(float32(triangle.x), float32(triangle.y), float32(triangle.z))
}
gl.End()
}
// 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
}
}
// 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(0.0, 0.0, float32(z)) // translate by z
gl.Rotatef(float32(xrot), 1.0, 0.0, 0.0) /* Rotate On The X Axis */
gl.Rotatef(float32(yrot), 0.0, 1.0, 0.0) /* Rotate On The Y Axis */
/* Select Our Texture */
gl.BindTexture(gl.TEXTURE_2D, uint(textures[filter])) // based on filter
gl.Begin(gl.QUADS)
// Front face
gl.Normal3f(0.0, 0.0, 1.0) // Normal Pointing Towards Viewer
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom left
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom right
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, 1.0, 1.0) // Top right
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, 1.0, 1.0) // Top left
// Back Face
gl.Normal3f(0.0, 0.0, -1.0) // Normal Pointing Away From Viewer
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, -1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, -1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, -1.0) // Bottom left
// Top Face
gl.Normal3f(0.0, 1.0, 0.0) // Normal Pointing Up
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(-1.0, 1.0, 1.0) // Bottom left
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(1.0, 1.0, 1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(1.0, 1.0, -1.0) // Top right
// Bottom Face
gl.Normal3f(0.0, -1.0, 0.0) // Normal Pointing Down
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, -1.0, -1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, -1.0, -1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom left
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom right
// Right face
gl.Normal3f(1.0, 0.0, 0.0) // Normal Pointing Right
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(1.0, -1.0, -1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(1.0, 1.0, -1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, 1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom left
// Left Face
gl.Normal3f(-1.0, 0.0, 0.0) // Normal Pointing Left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(-1.0, -1.0, -1.0) // Bottom left
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, 1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top left
gl.End()
sdl.GL_SwapBuffers()
xrot += xspeed
yrot += yspeed
// 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 drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(0, 0, z)
gl.Rotatef(rotation[0], 1, 0, 0)
gl.Rotatef(rotation[1], 0, 1, 0)
rotation[0] += speed[0]
rotation[1] += speed[1]
textures[filter].Bind(gl.TEXTURE_2D)
gl.Begin(gl.QUADS)
// Front Face
gl.Normal3f(0, 0, 1) // Normal Pointing Towards Viewer
gl.TexCoord2f(0, 0)
gl.Vertex3f(-1, -1, 1) // Point 1 (Front)
gl.TexCoord2f(1, 0)
gl.Vertex3f(1, -1, 1) // Point 2 (Front)
gl.TexCoord2f(1, 1)
gl.Vertex3f(1, 1, 1) // Point 3 (Front)
gl.TexCoord2f(0, 1)
gl.Vertex3f(-1, 1, 1) // Point 4 (Front)
// Back Face
gl.Normal3f(0, 0, -1) // Normal Pointing Away From Viewer
gl.TexCoord2f(1, 0)
gl.Vertex3f(-1, -1, -1) // Point 1 (Back)
gl.TexCoord2f(1, 1)
gl.Vertex3f(-1, 1, -1) // Point 2 (Back)
gl.TexCoord2f(0, 1)
gl.Vertex3f(1, 1, -1) // Point 3 (Back)
gl.TexCoord2f(0, 0)
gl.Vertex3f(1, -1, -1) // Point 4 (Back)
// Top Face
gl.Normal3f(0, 1, 0) // Normal Pointing Up
gl.TexCoord2f(0, 1)
gl.Vertex3f(-1, 1, -1) // Point 1 (Top)
gl.TexCoord2f(0, 0)
gl.Vertex3f(-1, 1, 1) // Point 2 (Top)
gl.TexCoord2f(1, 0)
gl.Vertex3f(1, 1, 1) // Point 3 (Top)
gl.TexCoord2f(1, 1)
gl.Vertex3f(1, 1, -1) // Point 4 (Top)
// Bottom Face
gl.Normal3f(0, -1, 0) // Normal Pointing Down
gl.TexCoord2f(1, 1)
gl.Vertex3f(-1, -1, -1) // Point 1 (Bottom)
gl.TexCoord2f(0, 1)
gl.Vertex3f(1, -1, -1) // Point 2 (Bottom)
gl.TexCoord2f(0, 0)
gl.Vertex3f(1, -1, 1) // Point 3 (Bottom)
gl.TexCoord2f(1, 0)
gl.Vertex3f(-1, -1, 1) // Point 4 (Bottom)
// Right face
gl.Normal3f(1, 0, 0) // Normal Pointing Right
gl.TexCoord2f(1, 0)
gl.Vertex3f(1, -1, -1) // Point 1 (Right)
gl.TexCoord2f(1, 1)
gl.Vertex3f(1, 1, -1) // Point 2 (Right)
gl.TexCoord2f(0, 1)
gl.Vertex3f(1, 1, 1) // Point 3 (Right)
gl.TexCoord2f(0, 0)
gl.Vertex3f(1, -1, 1) // Point 4 (Right)
// Left Face
gl.Normal3f(-1, 0, 0) // Normal Pointing Left
gl.TexCoord2f(0, 0)
gl.Vertex3f(-1, -1, -1) // Point 1 (Left)
gl.TexCoord2f(1, 0)
gl.Vertex3f(-1, -1, 1) // Point 2 (Left)
gl.TexCoord2f(1, 1)
gl.Vertex3f(-1, 1, 1) // Point 3 (Left)
gl.TexCoord2f(0, 1)
gl.Vertex3f(-1, 1, -1)
gl.End()
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)
gl.BindTexture(gl.TEXTURE_2D, uint(texture))
for loop, star := range stars {
gl.LoadIdentity()
gl.Translatef(0.0, 0.0, float32(zoom))
gl.Rotatef(float32(tilt), 1.0, 0.0, 0.0)
gl.Rotatef(float32(star.angle), 0.0, 1.0, 0.0)
gl.Translatef(float32(star.dist), 0.0, 0.0)
gl.Rotatef(float32(-star.angle), 0.0, 1.0, 0.0)
gl.Rotatef(float32(-tilt), 1.0, 0.0, 0.0)
if twinkle {
other := stars[(num-loop)-1]
gl.Color4ub(uint8(other.r), uint8(other.g), uint8(other.b), 255)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, 0.0)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, 0.0)
gl.End()
}
gl.Rotatef(float32(spin), 0.0, 0.0, 1.0)
gl.Color4ub(uint8(star.r), uint8(star.g), uint8(star.b), 255)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, 0.0)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, 0.0)
gl.End()
spin += 0.01
star.angle += gl.GLfloat(loop) / gl.GLfloat(num)
star.dist -= 0.01
if star.dist < 0.0 {
star.dist += 5.0
star.r = gl.GLubyte(rand.Float32() * 255)
star.g = gl.GLubyte(rand.Float32() * 255)
star.b = gl.GLubyte(rand.Float32() * 255)
}
}
// 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
}
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(0, 0, -5)
gl.Rotatef(rotation[0], 1, 0, 0)
gl.Rotatef(rotation[1], 0, 1, 0)
gl.Rotatef(rotation[2], 0, 0, 1)
rotation[0] += 0.3
rotation[1] += 0.2
rotation[2] += 0.4
textures[0].Bind(gl.TEXTURE_2D)
gl.Begin(gl.QUADS)
// Front Face
gl.TexCoord2f(0, 0)
gl.Vertex3f(-1, -1, 1) // Bottom Left Of The Texture and Quad
gl.TexCoord2f(1, 0)
gl.Vertex3f(1, -1, 1) // Bottom Right Of The Texture and Quad
gl.TexCoord2f(1, 1)
gl.Vertex3f(1, 1, 1) // Top Right Of The Texture and Quad
gl.TexCoord2f(0, 1)
gl.Vertex3f(-1, 1, 1) // Top Left Of The Texture and Quad
// Back Face
gl.TexCoord2f(1, 0)
gl.Vertex3f(-1, -1, -1) // Bottom Right Of The Texture and Quad
gl.TexCoord2f(1, 1)
gl.Vertex3f(-1, 1, -1) // Top Right Of The Texture and Quad
gl.TexCoord2f(0, 1)
gl.Vertex3f(1, 1, -1) // Top Left Of The Texture and Quad
gl.TexCoord2f(0, 0)
gl.Vertex3f(1, -1, -1) // Bottom Left Of The Texture and Quad
// Top Face
gl.TexCoord2f(0, 1)
gl.Vertex3f(-1, 1, -1) // Top Left Of The Texture and Quad
gl.TexCoord2f(0, 0)
gl.Vertex3f(-1, 1, 1) // Bottom Left Of The Texture and Quad
gl.TexCoord2f(1, 0)
gl.Vertex3f(1, 1, 1) // Bottom Right Of The Texture and Quad
gl.TexCoord2f(1, 1)
gl.Vertex3f(1, 1, -1) // Top Right Of The Texture and Quad
// Bottom Face
gl.TexCoord2f(1, 1)
gl.Vertex3f(-1, -1, -1) // Top Right Of The Texture and Quad
gl.TexCoord2f(0, 1)
gl.Vertex3f(1, -1, -1) // Top Left Of The Texture and Quad
gl.TexCoord2f(0, 0)
gl.Vertex3f(1, -1, 1) // Bottom Left Of The Texture and Quad
gl.TexCoord2f(1, 0)
gl.Vertex3f(-1, -1, 1) // Bottom Right Of The Texture and Quad
// Right face
gl.TexCoord2f(1, 0)
gl.Vertex3f(1, -1, -1) // Bottom Right Of The Texture and Quad
gl.TexCoord2f(1, 1)
gl.Vertex3f(1, 1, -1) // Top Right Of The Texture and Quad
gl.TexCoord2f(0, 1)
gl.Vertex3f(1, 1, 1) // Top Left Of The Texture and Quad
gl.TexCoord2f(0, 0)
gl.Vertex3f(1, -1, 1) // Bottom Left Of The Texture and Quad
// Left Face
gl.TexCoord2f(0, 0)
gl.Vertex3f(-1, -1, -1) // Bottom Left Of The Texture and Quad
gl.TexCoord2f(1, 0)
gl.Vertex3f(-1, -1, 1) // Bottom Right Of The Texture and Quad
gl.TexCoord2f(1, 1)
gl.Vertex3f(-1, 1, 1) // Top Right Of The Texture and Quad
gl.TexCoord2f(0, 1)
gl.Vertex3f(-1, 1, -1) // Top Left Of The Texture and Quad
gl.End()
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(0.0, 0.0, -7.0)
gl.Rotatef(float32(xrot), 1.0, 0.0, 0.0) /* Rotate On The X Axis */
gl.Rotatef(float32(yrot), 0.0, 1.0, 0.0) /* Rotate On The Y Axis */
gl.Rotatef(float32(zrot), 0.0, 0.0, 1.0) /* Rotate On The Z Axis */
/* Select Our Texture */
gl.BindTexture(gl.TEXTURE_2D, uint(texture))
gl.Begin(gl.QUADS) // Draw a quad
/* Front Face */
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom left
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom right
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, 1.0, 1.0) // Top right
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, 1.0, 1.0) // Top left
/* Back Face */
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, -1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, -1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, -1.0) // Bottom left
/* Top Face */
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(-1.0, 1.0, 1.0) // Bottom left
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(1.0, 1.0, 1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(1.0, 1.0, -1.0) // Top right
/* Bottom Face */
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, -1.0, -1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, -1.0, -1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom left
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom right
/* Right face */
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(1.0, -1.0, -1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(1.0, 1.0, -1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, 1.0) // Top left
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 1.0) // Bottom left
/* Left Face */
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(-1.0, -1.0, -1.0) // Bottom left
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 1.0) // Bottom right
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, 1.0) // Top right
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(-1.0, 1.0, -1.0) // Top left
gl.End() // done drawing the quad
// Draw to the screen
sdl.GL_SwapBuffers()
xrot += 0.3 /* X Axis Rotation */
yrot += 0.2 /* Y Axis Rotation */
zrot += 0.4 /* Z Axis Rotation */
// 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
}
}
