Golang gl21.Begin函数代码示例

func drawScene() {
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	gl.Rotated(-90, 1, 0, 0)
	//gl.Rotated(90, 0, 0, 1)
	gl.Rotated(gl.Double(-viewAngles[2]), 1, 0, 0)
	gl.Rotated(gl.Double(-viewAngles[0]), 0, 1, 0)
	gl.Rotated(gl.Double(-viewAngles[1]), 0, 0, 1)
	gl.Translated(gl.Double(viewOrg[0]), gl.Double(viewOrg[1]), gl.Double(viewOrg[2]))

	var r, g, b gl.Ubyte

	for i, face := range model.Faces {
		r = gl.Ubyte(i) + 100
		g = gl.Ubyte(i>>1) + 100
		b = gl.Ubyte(i>>2) + 100

		if model.Triangle {
			gl.Begin(gl.TRIANGLES)
		} else {
			gl.Begin(gl.LINES)
		}

		gl.Color4ub(r, g, b, 0xff)
		for _, v := range face.Verts {
			gl.Vertex3d(gl.Double(v.Pos[0]), gl.Double(v.Pos[1]), gl.Double(v.Pos[2]))
		}

		gl.End()
	}
}

func Cylinder(r, h gl.Float, slices int, hollow, solid bool) {
	res := 2 * math.Pi / float64(slices)
	mode := gl.LINE_LOOP
	if solid {
		mode = gl.QUADS
	}
	gl.Begin(gl.Enum(mode))
	for a := 0.0; a < 2*math.Pi; a += res {
		gl.Normal3f(gl.Float(math.Cos(a)), gl.Float(math.Sin(a)), 0)
		gl.Vertex3f(r*gl.Float(math.Cos(a)), r*gl.Float(math.Sin(a)), 0)
		gl.Vertex3f(r*gl.Float(math.Cos(a)), r*gl.Float(math.Sin(a)), h)
		a += res
		gl.Vertex3f(r*gl.Float(math.Cos(a)), r*gl.Float(math.Sin(a)), h)
		gl.Vertex3f(r*gl.Float(math.Cos(a)), r*gl.Float(math.Sin(a)), 0)
	}
	gl.End()
	if !hollow {
		// X Y plane
		if h < 0 {
			gl.Normal3f(0, 0, 1)
		} else {
			gl.Normal3f(0, 0, -1)
		}
		Circle(r, slices, solid)
		// Top (or bottom)
		if h < 0 {
			gl.Normal3f(0, 0, -1)
		} else {
			gl.Normal3f(0, 0, 1)
		}
		gl.Translatef(0, 0, h)
		Circle(r, slices, solid)
	}
}

func (wp *waypoint) RenderOnFloor() {
	if !wp.active {
		return
	}
	wp.drawn = true
	gl.Color4ub(200, 0, 0, 128)
	base.EnableShader("waypoint")
	base.SetUniformF("waypoint", "radius", float32(wp.Radius))

	t := float32(time.Now().UnixNano()%1e15) / 1.0e9
	base.SetUniformF("waypoint", "time", t)
	gl.Begin(gl.QUADS)
	gl.TexCoord2i(0, 1)
	gl.Vertex2i(int32(wp.X-wp.Radius), int32(wp.Y-wp.Radius))
	gl.TexCoord2i(0, 0)
	gl.Vertex2i(int32(wp.X-wp.Radius), int32(wp.Y+wp.Radius))
	gl.TexCoord2i(1, 0)
	gl.Vertex2i(int32(wp.X+wp.Radius), int32(wp.Y+wp.Radius))
	gl.TexCoord2i(1, 1)
	gl.Vertex2i(int32(wp.X+wp.Radius), int32(wp.Y-wp.Radius))
	gl.End()

	base.EnableShader("")

	// base.EnableShader("")
}

func (gw *GameWindow) Draw(region gui.Region, style gui.StyleStack) {
	defer base.StackCatcher()
	defer func() {
		// gl.Translated(gl.Double(gw.region.X), gl.Double(gw.region.Y), 0)
		gl.Disable(gl.TEXTURE_2D)
		gl.Color4ub(255, 255, 255, 255)
		gl.LineWidth(3)
		gl.Begin(gl.LINES)
		bx, by := gl.Int(region.X), gl.Int(region.Y)
		bdx, bdy := gl.Int(region.Dx), gl.Int(region.Dy)
		gl.Vertex2i(bx, by)
		gl.Vertex2i(bx, by+bdy)
		gl.Vertex2i(bx, by+bdy)
		gl.Vertex2i(bx+bdx, by+bdy)
		gl.Vertex2i(bx+bdx, by+bdy)
		gl.Vertex2i(bx+bdx, by)
		gl.Vertex2i(bx+bdx, by)
		gl.Vertex2i(bx, by)
		gl.End()
		gl.LineWidth(1)
	}()

	gw.Engine.Pause()
	game := gw.Engine.GetState().(*Game)
	game.RenderLocal(region, gw.Local)
	gw.Engine.Unpause()
}

func (gw *GameWindow) Draw(region g2.Region, style g2.StyleStack) {
	defer base.StackCatcher()
	defer func() {
		// gl.Translated(gl.Double(gw.region.X), gl.Double(gw.region.Y), 0)
		gl.Disable(gl.TEXTURE_2D)
		gl.Color4ub(255, 255, 255, 255)
		gl.LineWidth(3)
		gl.Begin(gl.LINES)
		bx, by := gl.Int(region.X), gl.Int(region.Y)
		bdx, bdy := gl.Int(region.Dx), gl.Int(region.Dy)
		gl.Vertex2i(bx, by)
		gl.Vertex2i(bx, by+bdy)
		gl.Vertex2i(bx, by+bdy)
		gl.Vertex2i(bx+bdx, by+bdy)
		gl.Vertex2i(bx+bdx, by+bdy)
		gl.Vertex2i(bx+bdx, by)
		gl.Vertex2i(bx+bdx, by)
		gl.Vertex2i(bx, by)
		gl.End()
		gl.LineWidth(1)
	}()

	gw.Engine.Pause()
	game := gw.Engine.GetState().(*Game)
	// Note that since we do a READER lock on game.local we cannot do any writes
	// to local data while rendering.
	game.local.RLock()
	game.RenderLocal(region)
	game.local.RUnlock()
	gw.Engine.Unpause()
}

func (tsm *ThunderSubMenu) Draw(region Region, style StyleStack) {
	gl.Disable(gl.TEXTURE_2D)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Enable(gl.BLEND)
	base.EnableShader("marble")
	offset, ok := style.Get("offset").(linear.Vec2)
	if ok {
		base.SetUniformV2("marble", "offset", offset)
	} else {
		base.SetUniformV2("marble", "offset", linear.Vec2{})
	}
	gl.Color4ub(255, 255, 255, 255)
	gl.Begin(gl.QUADS)
	x := gl.Int(region.X)
	y := gl.Int(region.Y)
	dx := gl.Int(region.Dx)
	dy := gl.Int(region.Dy)
	gl.Vertex2i(x, y)
	gl.Vertex2i(x, y+dy)
	gl.Vertex2i(x+dx, y+dy)
	gl.Vertex2i(x+dx, y)
	gl.End()
	base.EnableShader("")
	for i, option := range tsm.Options {
		region.Dy = tsm.requests[option].Dy
		if i == tsm.selected {
			style.PushStyle(map[string]interface{}{"selected": true})
		} else {
			style.PushStyle(map[string]interface{}{"selected": false})
		}
		option.Draw(region, style)
		style.Pop()
		region.Y += tsm.requests[option].Dy
	}
}

func (g *Game) renderLosMask(local *LocalData) {
	ent := g.Ents[local.moba.currentPlayer.gid]
	if ent == nil {
		return
	}
	walls := g.temp.VisibleWallCache[GidInvadersStart].GetWalls(int(ent.Pos().X), int(ent.Pos().Y))
	gl.Disable(gl.TEXTURE_2D)
	gl.Color4ub(0, 0, 0, 255)
	gl.Begin(gl.TRIANGLES)
	for _, wall := range walls {
		if wall.Right(ent.Pos()) {
			continue
		}
		a := wall.P
		b := ent.Pos().Sub(wall.P).Norm().Scale(-10000.0).Add(wall.P)
		mid := wall.P.Add(wall.Q).Scale(0.5)
		c := ent.Pos().Sub(mid).Norm().Scale(-10000.0).Add(mid)
		d := ent.Pos().Sub(wall.Q).Norm().Scale(-10000.0).Add(wall.Q)
		e := wall.Q
		gl.Vertex2d(gl.Double(a.X), gl.Double(a.Y))
		gl.Vertex2d(gl.Double(b.X), gl.Double(b.Y))
		gl.Vertex2d(gl.Double(c.X), gl.Double(c.Y))

		gl.Vertex2d(gl.Double(a.X), gl.Double(a.Y))
		gl.Vertex2d(gl.Double(c.X), gl.Double(c.Y))
		gl.Vertex2d(gl.Double(d.X), gl.Double(d.Y))

		gl.Vertex2d(gl.Double(a.X), gl.Double(a.Y))
		gl.Vertex2d(gl.Double(d.X), gl.Double(d.Y))
		gl.Vertex2d(gl.Double(e.X), gl.Double(e.Y))
	}
	gl.End()
	base.EnableShader("horizon")
	base.SetUniformV2("horizon", "center", ent.Pos())
	base.SetUniformF("horizon", "horizon", LosMaxDist)
	gl.Begin(gl.QUADS)
	dx := gl.Int(g.Levels[GidInvadersStart].Room.Dx)
	dy := gl.Int(g.Levels[GidInvadersStart].Room.Dy)
	gl.Vertex2i(0, 0)
	gl.Vertex2i(dx, 0)
	gl.Vertex2i(dx, dy)
	gl.Vertex2i(0, dy)
	gl.End()
	base.EnableShader("")
}

func (gw *GameWindow) Draw(region gui.Region) {
	gw.region = region
	latest_region = region
	gl.PushMatrix()
	defer gl.PopMatrix()
	gl.Translated(gl.Double(gw.region.X), gl.Double(gw.region.Y), 0)

	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	gw.game.manaSource.Draw(gw, float64(gw.game.Dx), float64(gw.game.Dy))

	gl.Begin(gl.LINES)
	gl.Color4d(1, 1, 1, 1)
	for _, poly := range gw.game.Room.Walls {
		for i := range poly {
			seg := poly.Seg(i)
			gl.Vertex2d(gl.Double(seg.P.X), gl.Double(seg.P.Y))
			gl.Vertex2d(gl.Double(seg.Q.X), gl.Double(seg.Q.Y))
		}
	}
	gl.End()

	gl.Begin(gl.TRIANGLE_FAN)
	gl.Color4d(1, 0, 0, 1)
	for _, poly := range gw.game.Room.Lava {
		for _, v := range poly {
			gl.Vertex2d(gl.Double(v.X), gl.Double(v.Y))
		}
	}
	gl.End()

	gl.Color4d(1, 1, 1, 1)
	for _, ent := range gw.game.Ents {
		ent.Draw(gw.game)
	}
	gl.Disable(gl.TEXTURE_2D)

	for _, player := range local.players {
		if player.active_ability != nil {
			player.active_ability.Draw(player.id, gw.game)
		}
	}
	// base.GetDictionary("luxisr").RenderString("monkeys!!!", 10, 10, 0, float64(gw.game.Game_thinks), gin.Left)
}

func (p *riftWalkProcess) Draw(gid game.Gid, g *game.Game, side int) {
	player, ok := g.Ents[p.PlayerGid].(*game.PlayerEnt)
	if !ok {
		return
	}
	if side != player.Side() {
		return
	}
	frac := p.Stored.Magnitude() / p.Threshold
	if frac < 1 {
		gl.Color4ub(255, 0, 0, 255)
	} else {
		gl.Color4ub(0, 255, 0, 255)
	}
	base.EnableShader("status_bar")
	var outer float32 = 0.2
	var increase float32 = 0.01
	if frac > 1 {
		frac = 1
	}
	base.SetUniformF("status_bar", "frac", float32(frac))
	base.SetUniformF("status_bar", "inner", outer-increase)
	base.SetUniformF("status_bar", "outer", outer)
	base.SetUniformF("status_bar", "buffer", 0.01)
	texture.Render(player.Pos().X-100, player.Pos().Y-100, 200, 200)
	base.EnableShader("")

	dist, radius := p.GetVals()
	dest := player.Pos().Add((linear.Vec2{dist, 0}).Rotate(player.Angle))
	gl.Disable(gl.TEXTURE_2D)
	gl.Color4d(1, 1, 1, 1)
	gl.Begin(gl.LINES)
	gl.Vertex2d(gl.Double(player.Pos().X), gl.Double(player.Pos().Y))
	gl.Vertex2d(gl.Double(dest.X), gl.Double(dest.Y))
	gl.End()
	n := 20
	gl.Begin(gl.LINES)
	for i := 0; i < n; i++ {
		v1 := dest.Add((linear.Vec2{radius, 0}).Rotate(float64(i) / float64(n) * 2 * math.Pi))
		v2 := dest.Add((linear.Vec2{radius, 0}).Rotate(float64(i+1) / float64(n) * 2 * math.Pi))
		gl.Vertex2d(gl.Double(v1.X), gl.Double(v1.Y))
		gl.Vertex2d(gl.Double(v2.X), gl.Double(v2.Y))
	}
	gl.End()
}

func (s *SegDisplay) lowerMid() {
	gl.Begin(gl.POLYGON)
	gl.Vertex2d(-s.mW*0.1, -s.mH*0.8)
	gl.Vertex2d(+s.mW*0.0, -s.mH*0.9)
	gl.Vertex2d(+s.mW*0.1, -s.mH*0.8)
	gl.Vertex2d(+s.mW*0.1, -s.mH*0.1)
	gl.Vertex2d(+s.mW*0.0, -s.mH*0.0)
	gl.Vertex2d(-s.mW*0.1, -s.mH*0.1)
	gl.End()
}

func (sp *SpawnPoint) Render(pos mathgl.Vec2, width float32) {
	gl.Disable(gl.TEXTURE_2D)
	gl.Color4d(1, 1, 1, 0.1)
	gl.Begin(gl.QUADS)
	gl.Vertex2f(pos.X-width/2, pos.Y)
	gl.Vertex2f(pos.X-width/2, pos.Y+width)
	gl.Vertex2f(pos.X+width/2, pos.Y+width)
	gl.Vertex2f(pos.X+width/2, pos.Y)
	gl.End()
}

func Render() {
	UpdateViewpos()
	ClearScene()
	gl.Begin(gl.QUADS)
	for i := range polys {
		polys[i].Render()
	}
	gl.End()
	glfw.SwapBuffers()
}

func (s *SegDisplay) top() {
	gl.Begin(gl.POLYGON)
	gl.Vertex2d(-s.mW*0.8, +s.mH*0.8)
	gl.Vertex2d(-s.mW*0.9, +s.mH*0.9)
	gl.Vertex2d(-s.mW*0.8, +s.mH*1.0)
	gl.Vertex2d(+s.mW*0.8, +s.mH*1.0)
	gl.Vertex2d(+s.mW*0.9, +s.mH*0.9)
	gl.Vertex2d(+s.mW*0.8, +s.mH*0.8)
	gl.End()
}

func (s *SegDisplay) lowerRight() {
	gl.Begin(gl.POLYGON)
	gl.Vertex2d(+s.mW*1.0, -s.mH*0.8)
	gl.Vertex2d(+s.mW*0.9, -s.mH*0.9)
	gl.Vertex2d(+s.mW*0.8, -s.mH*0.8)
	gl.Vertex2d(+s.mW*0.8, -s.mH*0.1)
	gl.Vertex2d(+s.mW*0.9, -s.mH*0.0)
	gl.Vertex2d(+s.mW*1.0, -s.mH*0.1)
	gl.End()
}

func (s *SegDisplay) midRight() {
	gl.Begin(gl.POLYGON)
	gl.Vertex2d(+s.mW*0.1, -s.mH*0.1)
	gl.Vertex2d(+s.mW*0.0, +s.mH*0.0)
	gl.Vertex2d(+s.mW*0.1, +s.mH*0.1)
	gl.Vertex2d(+s.mW*0.8, +s.mH*0.1)
	gl.Vertex2d(+s.mW*0.9, +s.mH*0.0)
	gl.Vertex2d(+s.mW*0.8, -s.mH*0.1)
	gl.End()
}