func (f *Font) DrawText2D(x int, y int, color [3]byte, scale float, txt string) (endw int, endh int) {
gl.LoadIdentity()
// gl.Translatef(0.0, 0.0, -2.0);
glEnable2D()
gl.Disable(gl.DEPTH_TEST)
texture, initial, intermediarya, intermediary, w, h := f.setupTextRendering(color, txt)
locX := gl.GLfloat(x)
locY := gl.GLfloat(y)
wi := gl.GLfloat(w) * gl.GLfloat(scale)
he := gl.GLfloat(h) * gl.GLfloat(scale)
/* 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.TexCoord2f(0.0, 1.0)
gl.Vertex2f(locX, locY)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex2f(locX+wi, locY)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex2f(locX+wi, locY+he)
gl.TexCoord2f(0.0, 0.0)
gl.Vertex2f(locX, locY+he)
gl.End()
endw, endh = f.teardownTextRendering(texture, initial, intermediarya, intermediary)
gl.Enable(gl.DEPTH_TEST)
glDisable2D()
return
}
func drawShip(angle gl.GLfloat) {
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(
gl.GLfloat(2.3*math.Cos(2*float64(rad)/math.Pi)+0.2),
gl.GLfloat(2.0*math.Sin(2*float64(rad)/math.Pi)))
}
gl.End()
}
gl.PopMatrix()
}
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 drawMap(cx, cy, zoom float64, triangles p2t.TriArray) {
for i := 0; i < len(triangles); i++ {
t := triangles[i]
a := t.Point[0]
b := t.Point[1]
c := t.Point[2]
//constrainedColor(t.constrained_edge[2])
gl.Begin(gl.LINES)
gl.Vertex2f(float32(a.X), float32(a.Y))
gl.Vertex2f(float32(b.X), float32(b.Y))
gl.End()
//constrainedColor(t.constrained_edge[0])
gl.Begin(gl.LINES)
gl.Vertex2f(float32(b.X), float32(b.Y))
gl.Vertex2f(float32(c.X), float32(c.Y))
gl.End()
//constrainedColor(t.constrained_edge[1])
gl.Begin(gl.LINES)
gl.Vertex2f(float32(c.X), float32(c.Y))
gl.Vertex2f(float32(a.X), float32(a.Y))
gl.End()
}
}
func draw(triangles p2t.TriArray) {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
for i := 0; i < len(triangles); i++ {
var t = triangles[i]
var a = t.Point[0]
var b = t.Point[1]
var c = t.Point[2]
// Red
gl.Color3f(1, 0, 0)
gl.Begin(gl.LINE_LOOP)
gl.Vertex2f(float32(a.X), float32(a.Y))
gl.Vertex2f(float32(b.X), float32(b.Y))
gl.Vertex2f(float32(c.X), float32(c.Y))
gl.End()
}
sdl.GL_SwapBuffers()
}