addition of Pen
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James Turk
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141
include/video/Pen.hpp
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141
include/video/Pen.hpp
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//This file is part of Photon (http://photon.sourceforge.net)
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//Copyright (C) 2004-2005 James Turk
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//
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// Author:
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// James Turk (jpt2433@rit.edu)
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//
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// Version:
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// $Id: Pen.hpp,v 1.1 2005/03/02 10:55:29 cozman Exp $
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#ifndef PHOTON_VIDEO_PEN_HPP
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#define PHOTON_VIDEO_PEN_HPP
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#include "types.hpp"
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#include "video/Color.hpp"
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#include "math/Rect.hpp"
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#include "math/Vector2.hpp"
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#include "math/Circle.hpp"
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namespace photon
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{
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namespace video
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{
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// Class: Pen
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// Class which is used for drawing primitives.
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//
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// Each instance of pen has a color, and the various members simply draw
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// primitives in that color.
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class Pen
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{
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// Group: (Con/De)structors
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public:
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// Function: Pen
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// Default constructor, sets color to white.
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Pen();
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// Function: Pen
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// Initializing constructor, takes components of color to use for drawing.
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//
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// Parameters:
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// r - Value for red component.
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// g - Value for green component.
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// b - Value for blue component.
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// a - Value for alpha component. [default: 255]
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//
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// See Also:
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// <setColor>
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Pen(ubyte r, ubyte g, ubyte b, ubyte a=255);
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// Function: Pen
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// Initializing constructor, takes <Color> to use for drawing..
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//
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// Parameters:
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// color - <Color> to use for drawing.
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//
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// See Also:
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// <setColor>
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Pen(Color color);
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// Group: Color
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public:
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// Function: setColor
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// Sets color to use for drawing.
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//
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// Parameters:
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// r - Value for red component.
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// g - Value for green component.
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// b - Value for blue component.
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// a - Value for alpha component. [default: 255]
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void setColor(ubyte r, ubyte g, ubyte b, ubyte a=255);
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// Function: setColor
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// Sets color to use for drawing.
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//
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// Parameters:
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// color - <Color> to use for drawing.
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void setColor(Color color);
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// Group: Drawing
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public:
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// Function: drawPoint
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// Draws a single point.
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//
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// Parameters:
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// point - Point to draw.
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void drawPoint(math::Point2 point) const;
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// Function: drawLine
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// Draw a line from one point to another.
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//
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// Parameters:
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// p1 - First endpoint of line.
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// p2 - Second endpoint of line.
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void drawLine(math::Point2 p1, math::Point2 p2) const;
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// Function: drawVector
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// Draw a vector, including small arrow, with base at a given point.
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//
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// Parameters:
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// point - Base point for vector.
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// vector - Vector to draw.
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void drawVector(math::Point2 point, math::Vector2 vector) const;
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// Function: drawRectangle
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// Draw an empty rectangle.
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//
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// Parameters:
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// rect - <Rect> to draw.
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void drawRectangle(const math::Rect &rect) const;
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// Function: fillRectangle
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// Draw a filled rectangle.
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//
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// Parameters:
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// rect - <Rect> to draw.
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void fillRectangle(const math::Rect &rect) const;
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// Function: drawCircle
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// Draw an empty circle.
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//
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// Parameters:
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// circle - <Circle> to draw.
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void drawCircle(const math::Circle &circle) const;
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// Function: fillCircle
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// Draw a filled circle.
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//
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// Parameters:
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// circle - <Circle> to draw.
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void fillCircle(const math::Circle &circle) const;
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// data members
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private:
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Color color_;
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};
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}
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}
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#endif //PHOTON_VIDEO_PEN_HPP
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197
src/video/Pen.cpp
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197
src/video/Pen.cpp
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//This file is part of Photon (http://photon.sourceforge.net)
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//Copyright (C) 2004-2005 James Turk
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//
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// Author:
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// James Turk (jpt2433@rit.edu)
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//
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// Version:
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// $Id: Pen.cpp,v 1.1 2005/03/02 10:55:29 cozman Exp $
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#include "video/Pen.hpp"
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#include "gl/gl.h"
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#include "math/math.hpp"
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namespace photon
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{
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namespace video
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{
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Pen::Pen() :
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color_(255,255,255,255)
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{
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}
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Pen::Pen(ubyte r, ubyte g, ubyte b, ubyte a) :
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color_(r,g,b,a)
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{
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}
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Pen::Pen(Color color) :
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color_(color)
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{
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}
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void Pen::setColor(ubyte r, ubyte g, ubyte b, ubyte a)
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{
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color_.setColor(r,g,b,a);
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}
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void Pen::setColor(Color color)
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{
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color_ = color;
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}
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void Pen::drawPoint(math::Point2 point) const
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{
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glBindTexture(GL_TEXTURE_2D,0);
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color_.makeGLColor();
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glBegin(GL_POINTS);
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glVertex2d(point.x,point.y);
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glEnd();
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glColor4ub(255,255,255,255);
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}
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void Pen::drawLine(math::Point2 p1, math::Point2 p2) const
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{
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glBindTexture(GL_TEXTURE_2D,0);
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color_.makeGLColor();
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glBegin(GL_LINES);
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glVertex2d(p1.x,p1.y);
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glVertex2d(p2.x,p2.y);
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glEnd();
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glColor4ub(255,255,255,255);
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}
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void Pen::drawVector(math::Point2 point, math::Vector2 vector) const
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{
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double x2,y2,x3,y3,x4,y4;
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math::Vector2 v;
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x2 = point.x+vector.x;
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y2 = point.y+vector.y;
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//calculate an arrow (5pi/6)
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v.resolveRad(vector.getMagnitude()/5,vector.getAngleRad()+(5./6)*math::Pi);
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x3 = x2+v.x;
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y3 = y2-v.y;
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v.resolveRad(vector.getMagnitude()/5,vector.getAngleRad()-(5./6)*math::Pi);
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x4 = x2+v.x;
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y4 = y2-v.y;
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glBindTexture(GL_TEXTURE_2D,0);
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color_.makeGLColor();
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glBegin(GL_LINE_STRIP);
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glVertex2d(point.x,point.y);
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glVertex2d(x2,y2);
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glVertex2d(x3,y3);
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glVertex2d(x4,y4);
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glVertex2d(x2,y2);
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glEnd();
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glColor4ub(255,255,255,255);
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}
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void Pen::drawRectangle(const math::Rect &rect) const
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{
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glBindTexture(GL_TEXTURE_2D,0);
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color_.makeGLColor();
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glBegin(GL_LINE_STRIP);
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glVertex2d(rect.getLeft(),rect.getTop());
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glVertex2d(rect.getRight(),rect.getTop());
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glVertex2d(rect.getRight(),rect.getBottom());
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glVertex2d(rect.getLeft(),rect.getBottom());
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glVertex2d(rect.getLeft(),rect.getTop());
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glEnd();
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glColor4ub(255,255,255,255);
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}
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void Pen::fillRectangle(const math::Rect &rect) const
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{
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glBindTexture(GL_TEXTURE_2D,0);
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color_.makeGLColor();
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glBegin(GL_QUADS);
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glVertex2d(rect.getLeft(),rect.getTop());
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glVertex2d(rect.getRight(),rect.getTop());
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glVertex2d(rect.getRight(),rect.getBottom());
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glVertex2d(rect.getLeft(),rect.getBottom());
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glEnd();
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glColor4ub(255,255,255,255);
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}
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void Pen::drawCircle(const math::Circle &circle) const
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{
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//written from Bresenham's algorithm
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double cx(circle.getCenter().x);
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double cy(circle.getCenter().y);
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double d(3-(2*circle.getRadius()));
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double x(0);
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double y(circle.getRadius());
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glBindTexture(GL_TEXTURE_2D,0);
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color_.makeGLColor();
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glBegin(GL_POINTS);
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while(y > x)
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{
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glVertex2d(cx+x,cy+y);
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glVertex2d(cx+x,cy-y);
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glVertex2d(cx-x,cy+y);
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glVertex2d(cx-x,cy-y);
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glVertex2d(cx+y,cy+x);
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glVertex2d(cx+y,cy-x);
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glVertex2d(cx-y,cy+x);
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glVertex2d(cx-y,cy-x);
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if(d < 0)
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{
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d += x*4 + 6;
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}
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else
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{
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d += (x-y)*4 + 10;
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--y;
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}
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++x;
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}
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glEnd();
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glColor4ub(255,255,255,255);
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}
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void Pen::fillCircle(const math::Circle &circle) const
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{
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//written from Bresenham's algorithm
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double cx(circle.getCenter().x);
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double cy(circle.getCenter().y);
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double d(3-(2*circle.getRadius()));
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double x(0);
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double y(circle.getRadius());
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glBindTexture(GL_TEXTURE_2D,0);
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color_.makeGLColor();
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glBegin(GL_LINES);
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while(y > x)
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{
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glVertex2d(cx+x,cy+y);
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glVertex2d(cx+x,cy-y);
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glVertex2d(cx-x,cy-y);
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glVertex2d(cx-x,cy+y);
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glVertex2d(cx+y,cy+x);
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glVertex2d(cx-y,cy+x);
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glVertex2d(cx-y,cy-x);
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glVertex2d(cx+y,cy-x);
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if(d < 0)
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{
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d += x*4 + 6;
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}
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else
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{
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d += (x-y)*4 + 10;
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--y;
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}
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++x;
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}
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glEnd();
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glColor4ub(255,255,255,255);
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}
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}
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}
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