70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_VIEWPORT_H
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#define IGL_VIEWPORT_H
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namespace igl
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{
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// Simple Viewport class for an opengl context. Handles reshaping and mouse.
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struct Viewport
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{
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int x,y,width,height;
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// Constructors
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Viewport(
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const int x=0,
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const int y=0,
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const int width=0,
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const int height=0):
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x(x),
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y(y),
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width(width),
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height(height)
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{
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};
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virtual ~Viewport(){}
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void reshape(
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const int x,
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const int y,
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const int width,
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const int height)
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{
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this->x = x;
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this->y = y;
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this->width = width;
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this->height = height;
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};
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// Given mouse_x,mouse_y on the entire window return mouse_x, mouse_y in
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// this viewport.
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//
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// Inputs:
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// my mouse y-coordinate
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// wh window height
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// Returns y-coordinate in viewport
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int mouse_y(const int my,const int wh)
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{
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return my - (wh - height - y);
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}
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// Inputs:
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// mx mouse x-coordinate
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// Returns x-coordinate in viewport
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int mouse_x(const int mx)
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{
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return mx - x;
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}
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// Returns whether point (mx,my) is in extend of Viewport
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bool inside(const int mx, const int my) const
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{
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return
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mx >= x && my >= y &&
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mx < x+width && my < y+height;
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}
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};
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}
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#endif
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