func drawFrame() {
gl.LoadIdentity()
gl.LineWidth(5.0)
gl.Enable(gl.POINT_SMOOTH)
gl.Enable(gl.LINE_SMOOTH)
gl.Color4f(gl.GLfloat(FrameColor[0]), gl.GLfloat(FrameColor[1]), gl.GLfloat(FrameColor[2]), 0.1)
m := PlayArea
t := 1.0 * m
b := -1.0 * m
r := 1.0 * m
l := -1.0 * m
gl.Begin(gl.LINE_STRIP)
zo := -5.0
gl.Vertex3f(gl.GLfloat(l), gl.GLfloat(t), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(r), gl.GLfloat(t), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(r), gl.GLfloat(b), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(l), gl.GLfloat(b), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(l), gl.GLfloat(t), gl.GLfloat(zo))
gl.End()
}
func main() {
ret := glfw.Init()
print(ret)
ret = glfw.OpenWindow(300, 300, 0, 0, 0, 0, 0, 0, glfw.WINDOW)
print(ret)
if gl.Init() != 0 {
panic("glew error")
}
running := true
for running {
gl.Begin(gl.TRIANGLES)
gl.Vertex3f(0, 0, 0)
gl.Vertex3f(0, 1, 0)
gl.Vertex3f(1, 1, 0)
gl.End()
glfw.SwapBuffers()
running = glfw.GetKey(glfw.KEY_ESC) == 0 && glfw.GetWindowParam(glfw.OPENED) != 0
}
}
func drawWin(d float) {
gl.LoadIdentity()
// gl.LineWidth(5.0)
// gl.Enable(gl.POINT_SMOOTH)
// gl.Enable(gl.LINE_SMOOTH)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
if d > 1.0 {
d = 1.0
}
c := WinColor
gl.Color4f(gl.GLfloat(c[0]), gl.GLfloat(c[1]), gl.GLfloat(c[2]), gl.GLfloat(d))
m := PlayArea * 4
t := 1.0 * m
b := -1.0 * m
r := 1.0 * m
l := -1.0 * m
gl.Begin(gl.POLYGON)
zo := -10.0
gl.Vertex3f(gl.GLfloat(l), gl.GLfloat(t), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(r), gl.GLfloat(t), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(r), gl.GLfloat(b), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(l), gl.GLfloat(b), gl.GLfloat(zo))
gl.Vertex3f(gl.GLfloat(l), gl.GLfloat(t), gl.GLfloat(zo))
gl.End()
gl.Disable(gl.BLEND)
}
func (f *Font) DrawText3D(pos Vector3, color [3]byte, scale float, txt string) (endw int, endh int) {
gl.LoadIdentity()
// gl.Translatef(gl.GLfloat(pos.X), gl.GLfloat(pos.Y), gl.GLfloat(-4.99));
gl.Translatef(gl.GLfloat(pos.X), gl.GLfloat(pos.Y), gl.GLfloat(-4.99))
gl.Scalef(gl.GLfloat(1.0/64.0*scale), gl.GLfloat(1.0/64.0*scale), gl.GLfloat(1.0))
gl.Disable(gl.DEPTH_TEST)
texture, initial, intermediarya, intermediary, w, h := f.setupTextRendering(color, txt)
wi := gl.GLfloat(w)
he := gl.GLfloat(h)
locX := gl.GLfloat(0) - wi*0.5
locY := gl.GLfloat(0) - he*0.5
/* Draw a quad at location */
gl.Begin(gl.QUADS)
/* Recall that the origin is in the lower-left corner
That is why the TexCoords specify different corners
than the Vertex coors seem to. */
gl.Color4f(1.0, 1.0, 0.0, 1.0)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(locX, locY, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(locX+wi, locY, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(locX+wi, locY+he, 0.0)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(locX, locY+he, 0.0)
gl.End()
endw, endh = f.teardownTextRendering(texture, initial, intermediarya, intermediary)
gl.Enable(gl.DEPTH_TEST)
return
}
// 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
}
}
// 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
}
}
func drawCircle(t *trigger) {
radius := float64(t.Size)
pos := t.Pos
gl.LoadIdentity()
gl.Color4f(gl.GLfloat(t.Col[0]), gl.GLfloat(t.Col[1]), gl.GLfloat(t.Col[2]), gl.GLfloat(t.Col[3]))
gl.LineWidth(2.0)
gl.Translatef(gl.GLfloat(pos.X), gl.GLfloat(pos.Y), gl.GLfloat(pos.Z))
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Begin(gl.POLYGON)
for i := 0; i < 360; i++ {
var degInRad float64 = float64(i) * DEG2RAD
gl.Vertex3f(gl.GLfloat(math.Cos(degInRad)*radius), gl.GLfloat(math.Sin(degInRad)*radius), gl.GLfloat(0.0))
}
gl.End()
gl.Disable(gl.BLEND)
}
// 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
}
}
// 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
}
}
// 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
}
}
// 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
}
}
func drawCubes(v *Vector3) {
gl.LoadIdentity()
// gl.Translatef( -1.5, 0.0, -6.0 )
gl.Translatef(gl.GLfloat(v.X), gl.GLfloat(v.Y), gl.GLfloat(v.Z))
/* Rotate The Triangle On The Y axis ( NEW ) */
gl.Rotatef(rtri, 0.0, 1.0, 0.0)
gl.Begin(gl.TRIANGLES) /* Drawing Using 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() /* Finished Drawing The Triangle */
rtri = rtri + 0.2
return
/* Move Right 3 Units */
gl.LoadIdentity()
gl.Translatef(1.5, 0.0, -6.0)
/* Rotate The Quad On The X axis ( NEW ) */
gl.Rotatef(rquad, 1.0, 0.0, 0.0)
/* Set The Color To Blue One Time Only */
gl.Color3f(0.5, 0.5, 1.0)
gl.Begin(gl.QUADS) /* Draw A Quad */
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 (Botm) */
gl.Vertex3f(-1.0, -1.0, 1.0) /* Top Left Of The Quad (Botm) */
gl.Vertex3f(-1.0, -1.0, -1.0) /* Bottom Left Of The Quad (Botm) */
gl.Vertex3f(1.0, -1.0, -1.0) /* Bottom Right Of The Quad (Botm) */
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 */
rquad -= 0.15
}
func drawCube(v *Vector3) {
gl.LoadIdentity()
// gl.Translatef( -1.5, 0.0, -6.0 )
gl.Translatef(gl.GLfloat(v.X), gl.GLfloat(v.Y), gl.GLfloat(v.Z))
/* Rotate The Triangle On The Y axis ( NEW ) */
// gl.Rotatef( rtri, 0.0, 1.0, 0.0 );
gl.Begin(gl.TRIANGLES) /* Drawing Using 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() /* Finished Drawing The Triangle */
rtri = rtri + 0.2
}
func drawMass(m *phys.Mass, dsz gl.GLfloat) {
gl.LoadIdentity()
// gl.Translatef( -1.5, 0.0, -6.0 )
v := m.Pos
gl.Translatef(gl.GLfloat(v.X), gl.GLfloat(v.Y), gl.GLfloat(v.Z))
/* Rotate The Triangle On The Y axis ( NEW ) */
// gl.Rotatef( rtri, 0.0, 1.0, 0.0 );
gl.Begin(gl.TRIANGLES) /* Drawing Using Triangles */
gl.Color3f(dsz, 0.0, 0.0) /* Red */
gl.Vertex3f(0.0, dsz, 0.0) /* Top Of Triangle (Front) */
gl.Color3f(0.0, dsz, 0.0) /* Green */
gl.Vertex3f(-dsz, -dsz, dsz) /* Left Of Triangle (Front) */
gl.Color3f(0.0, 0.0, dsz) /* Blue */
gl.Vertex3f(dsz, -dsz, dsz) /* Right Of Triangle (Front) */
gl.Color3f(dsz, 0.0, 0.0) /* Red */
gl.Vertex3f(0.0, dsz, 0.0) /* Top Of Triangle (Right) */
gl.Color3f(0.0, 0.0, dsz) /* Blue */
gl.Vertex3f(dsz, -dsz, dsz) /* Left Of Triangle (Right) */
gl.Color3f(0.0, dsz, 0.0) /* Green */
gl.Vertex3f(dsz, -dsz, -dsz) /* Right Of Triangle (Right) */
gl.Color3f(dsz, 0.0, 0.0) /* Red */
gl.Vertex3f(0.0, dsz, 0.0) /* Top Of Triangle (Back) */
gl.Color3f(0.0, dsz, 0.0) /* Green */
gl.Vertex3f(dsz, -dsz, -dsz) /* Left Of Triangle (Back) */
gl.Color3f(0.0, 0.0, dsz) /* Blue */
gl.Vertex3f(-dsz, -dsz, -dsz) /* Right Of Triangle (Back) */
gl.Color3f(dsz, 0.0, 0.0) /* Red */
gl.Vertex3f(0.0, dsz, 0.0) /* Top Of Triangle (Left) */
gl.Color3f(0.0, 0.0, dsz) /* Blue */
gl.Vertex3f(-dsz, -dsz, -dsz) /* Left Of Triangle (Left) */
gl.Color3f(0.0, dsz, 0.0) /* Green */
gl.Vertex3f(-dsz, -dsz, dsz) /* Right Of Triangle (Left) */
gl.End() /* Finished Drawing The Triangle */
}
// 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 cube(color []float32) {
gl.Materialfv(gl.FRONT, gl.AMBIENT_AND_DIFFUSE, whiteColor)
gl.Color4f(color[0], color[1], color[2], color[3])
// TOP
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex3f(cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, cubeWidth, cubeWidth)
gl.End()
// Bottom
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex3f(cubeWidth, -cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, -cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, -cubeWidth)
gl.End()
// Front
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex3f(cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, cubeWidth)
gl.End()
// Back
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex3f(cubeWidth, -cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(cubeWidth, cubeWidth, -cubeWidth)
gl.End()
// Left
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex3f(-cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, cubeWidth)
gl.End()
// Right
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex3f(cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, -cubeWidth)
gl.End()
//*
gl.Color4f(color[0]/1.2, color[1]/1.2, color[2]/1.2, 1.0)
gl.Begin(gl.LINE_STRIP) // Start Drawing Our Player Using Lines
// TOP
gl.Vertex3f(cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, cubeWidth, cubeWidth)
// Front
gl.Vertex3f(-cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, cubeWidth)
// Bottom
gl.Vertex3f(-cubeWidth, -cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, -cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, -cubeWidth)
// Back
gl.Vertex3f(-cubeWidth, -cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(cubeWidth, cubeWidth, -cubeWidth)
// Right
gl.Vertex3f(cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, cubeWidth)
gl.Vertex3f(cubeWidth, -cubeWidth, -cubeWidth)
// Left
gl.Vertex3f(-cubeWidth, cubeWidth, cubeWidth)
gl.Vertex3f(-cubeWidth, cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, -cubeWidth)
gl.Vertex3f(-cubeWidth, -cubeWidth, cubeWidth)
gl.End()
//*/
}