Ejemplo n.º 1
0
func reshape(w, h int) {
	gl.Viewport(0, 0, gl.GLsizei(w), gl.GLsizei(h))
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, gl.GLdouble(w), 0, gl.GLdouble(h), -1, 1)
	gl.Scalef(1, -1, 1)
	gl.Translatef(0, gl.GLfloat(-h), 0)
	gl.MatrixMode(gl.MODELVIEW)
}
Ejemplo n.º 2
0
func stroke_output(x, y gl.GLfloat, str string, font glut.StrokeFont) {
	gl.PushMatrix()
	gl.Translatef(x, y, 0)
	gl.Scalef(0.005, 0.005, 0.005)
	for _, ch := range str {
		font.Character(ch)
	}
	gl.PopMatrix()
}
Ejemplo n.º 3
0
func reshape(w, h int) {
	gl.Viewport(0, 0, w, h)
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, float64(w), 0, float64(h), -1, 1)
	gl.Scalef(1, -1, 1)
	gl.Translatef(0, float32(-h), 0)
	gl.MatrixMode(gl.MODELVIEW)
}
Ejemplo n.º 4
0
func reshape(w, h int) {
	/* Because Gil specified "screen coordinates" (presumably with an
	   upper-left origin), this short bit of code sets up the coordinate
	   system to correspond to actual window coodrinates.  This code
	   wouldn't be required if you chose a (more typical in 3D) abstract
	   coordinate system. */

	gl.Viewport(0, 0, w, h)                       /* Establish viewing area to cover entire window. */
	gl.MatrixMode(gl.PROJECTION)                  /* Start modifying the projection matrix. */
	gl.LoadIdentity()                             /* Reset project matrix. */
	gl.Ortho(0, float64(w), 0, float64(h), -1, 1) /* Map abstract coords directly to window coords. */
	gl.Scalef(1, -1, 1)                           /* Invert Y axis so increasing Y goes down. */
	gl.Translatef(0, float32(-h), 0)              /* Shift origin up to upper-left corner. */
}
Ejemplo n.º 5
0
func reshape(w, h int) {
	/* Because Gil specified "screen coordinates" (presumably with an
	   upper-left origin), this short bit of code sets up the coordinate
	   system to correspond to actual window coodrinates.  This code
	   wouldn't be required if you chose a (more typical in 3D) abstract
	   coordinate system. */
	gl.ClearColor(1, 1, 1, 1)
	//fmt.Println(gl.GetString(gl.EXTENSIONS))
	gl.Viewport(0, 0, w, h)                       /* Establish viewing area to cover entire window. */
	gl.MatrixMode(gl.PROJECTION)                  /* Start modifying the projection matrix. */
	gl.LoadIdentity()                             /* Reset project matrix. */
	gl.Ortho(0, float64(w), 0, float64(h), -1, 1) /* Map abstract coords directly to window coords. */
	gl.Scalef(1, -1, 1)                           /* Invert Y axis so increasing Y goes down. */
	gl.Translatef(0, float32(-h), 0)              /* Shift origin up to upper-left corner. */
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Disable(gl.DEPTH_TEST)
	width, height = w, h
}
Ejemplo n.º 6
0
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
}