Golang Mat4.Translation方法代码示例

func RenderAdvanced(x, y, dx, dy, rot float64, flip bool) {
	setupTextureList()
	if textureList == 0 {
		return
	}
	var run, op mathgl.Mat4
	run.Identity()
	op.Translation(float32(x), float32(y), 0)
	run.Multiply(&op)
	op.Translation(float32(dx/2), float32(dy/2), 0)
	run.Multiply(&op)
	op.RotationZ(float32(rot))
	run.Multiply(&op)
	if flip {
		op.Translation(float32(-dx/2), float32(-dy/2), 0)
		run.Multiply(&op)
		op.Scaling(float32(dx), float32(dy), 1)
		run.Multiply(&op)
	} else {
		op.Translation(float32(dx/2), float32(-dy/2), 0)
		run.Multiply(&op)
		op.Scaling(float32(-dx), float32(dy), 1)
		run.Multiply(&op)
	}
	gl.PushMatrix()
	gl.MultMatrixf((*gl.Float)(&run[0]))
	gl.Enable(gl.TEXTURE_2D)
	gl.CallList(textureList)
	gl.PopMatrix()
}

func Render(x, y, dx, dy float64) {
	var run, op mathgl.Mat4
	run.Identity()
	op.Translation(float32(x), float32(y), 0)
	run.Multiply(&op)
	op.Scaling(float32(dx), float32(dy), 1)
	run.Multiply(&op)

	gl.PushMatrix()
	gl.Enable(gl.TEXTURE_2D)
	gl.MultMatrixf((*gl.Float)(&run[0]))
	gl.CallList(textureList)
	gl.PopMatrix()
}

func makeRoomMats(room *roomDef, region gui.Region, focusx, focusy, angle, zoom float32) (floor, ifloor, left, ileft, right, iright mathgl.Mat4) {
	var m mathgl.Mat4
	floor.Translation(float32(region.Dx/2+region.X), float32(region.Dy/2+region.Y), 0)

	// NOTE: If we want to change 45 to *anything* else then we need to do the
	// appropriate math for rendering quads for furniture
	m.RotationZ(45 * math.Pi / 180)
	floor.Multiply(&m)
	m.RotationAxisAngle(mathgl.Vec3{X: -1, Y: 1}, -float32(angle)*math.Pi/180)
	floor.Multiply(&m)

	s := float32(zoom)
	m.Scaling(s, s, s)
	floor.Multiply(&m)

	// Move the viewer so that the focus is at the origin, and hence becomes centered
	// in the window
	m.Translation(-focusx, -focusy, 0)
	floor.Multiply(&m)

	ifloor.Assign(&floor)
	ifloor.Inverse()

	// Also make the mats for the left and right walls based on this mat
	left.Assign(&floor)
	m.RotationX(-math.Pi / 2)
	left.Multiply(&m)
	m.Translation(0, 0, float32(room.Size.Dy))
	left.Multiply(&m)
	ileft.Assign(&left)
	ileft.Inverse()

	right.Assign(&floor)
	m.RotationX(-math.Pi / 2)
	right.Multiply(&m)
	m.RotationY(-math.Pi / 2)
	right.Multiply(&m)
	m.Scaling(1, 1, 1)
	right.Multiply(&m)
	m.Translation(0, 0, -float32(room.Size.Dx))
	right.Multiply(&m)
	swap_x_y := mathgl.Mat4{
		0, 1, 0, 0,
		1, 0, 0, 0,
		0, 0, 1, 0,
		0, 0, 0, 1,
	}
	right.Multiply(&swap_x_y)
	iright.Assign(&right)
	iright.Inverse()

	return floor, ifloor, left, ileft, right, iright
}

//.........这里部分代码省略.........
		new_state.room.dy = room.Size.Dy
		if new_state != state {
			wt.setupGlStuff(room.X, room.Y, room.Size.Dx, room.Size.Dy, &ids)
			room.wall_texture_gl_map[wt] = ids
			room.wall_texture_state_map[wt] = new_state
		}
		gl.LoadMatrixf(&floor[0])
		if ids.vbuffer != 0 {
			wt.Texture.Data().Bind()
			R, G, B, A := wt.Color()

			gl.ClientActiveTexture(gl.TEXTURE0)
			gl.BindBuffer(gl.ARRAY_BUFFER, ids.vbuffer)
			gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
			gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
			gl.ClientActiveTexture(gl.TEXTURE1)
			gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
			gl.ClientActiveTexture(gl.TEXTURE0)
			if ids.floor_buffer != 0 {
				gl.StencilFunc(gl.ALWAYS, 2, 2)
				gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.floor_buffer)
				gl.Color4ub(R, G, B, A)
				gl.DrawElements(gl.TRIANGLES, ids.floor_count, gl.UNSIGNED_SHORT, nil)
			}
			if ids.left_buffer != 0 {
				gl.StencilFunc(gl.ALWAYS, 1, 1)
				gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.left_buffer)
				do_color(R, G, B, alphaMult(A, room.far_left.wall_alpha))
				gl.DrawElements(gl.TRIANGLES, ids.left_count, gl.UNSIGNED_SHORT, nil)
			}
			if ids.right_buffer != 0 {
				gl.StencilFunc(gl.ALWAYS, 1, 1)
				gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.right_buffer)
				do_color(R, G, B, alphaMult(A, room.far_right.wall_alpha))
				gl.DrawElements(gl.TRIANGLES, ids.right_count, gl.UNSIGNED_SHORT, nil)
			}
		}
	}
	base.EnableShader("marble")
	base.SetUniformI("marble", "tex2", 1)
	base.SetUniformF("marble", "room_x", float32(room.X))
	base.SetUniformF("marble", "room_y", float32(room.Y))
	for _, door := range room.Doors {
		door.setupGlStuff(room)
		if door.threshold_glids.vbuffer == 0 {
			continue
		}
		if door.AlwaysOpen() {
			continue
		}
		if door.highlight_threshold {
			gl.Color4ub(255, 255, 255, 255)
		} else {
			gl.Color4ub(128, 128, 128, 255)
		}
		gl.BindBuffer(gl.ARRAY_BUFFER, door.threshold_glids.vbuffer)
		gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
		gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
		gl.ClientActiveTexture(gl.TEXTURE1)
		gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
		gl.ClientActiveTexture(gl.TEXTURE0)
		gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, door.threshold_glids.floor_buffer)
		gl.DrawElements(gl.TRIANGLES, door.threshold_glids.floor_count, gl.UNSIGNED_SHORT, nil)
	}
	base.EnableShader("")
	if los_tex != nil {
		base.EnableShader("")
		gl.ActiveTexture(gl.TEXTURE1)
		gl.Disable(gl.TEXTURE_2D)
		gl.ActiveTexture(gl.TEXTURE0)
		gl.ClientActiveTexture(gl.TEXTURE1)
		gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
		gl.ClientActiveTexture(gl.TEXTURE0)
	}

	run.Assign(&floor)
	mul.Translation(float32(-room.X), float32(-room.Y), 0)
	run.Multiply(&mul)
	gl.LoadMatrixf(&run[0])
	gl.StencilFunc(gl.EQUAL, 2, 3)
	gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
	room_rect := image.Rect(room.X, room.Y, room.X+room.Size.Dx, room.Y+room.Size.Dy)
	for _, fd := range floor_drawers {
		x, y := fd.Pos()
		dx, dy := fd.Dims()
		if room_rect.Overlaps(image.Rect(x, y, x+dx, y+dy)) {
			fd.RenderOnFloor()
		}
	}

	do_color(255, 255, 255, 255)
	gl.LoadIdentity()
	gl.Disable(gl.STENCIL_TEST)
	room.renderFurniture(floor, 255, drawables, los_tex)

	gl.ClientActiveTexture(gl.TEXTURE1)
	gl.Disable(gl.TEXTURE_2D)
	gl.ClientActiveTexture(gl.TEXTURE0)
	base.EnableShader("")
}