Created
February 10, 2014 12:55
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Cylinder in OpenGL with mesh.
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| /* | |
| Robbie Lynch | |
| */ | |
| //////////////////////////////////////////////////////////// | |
| // Headers | |
| //////////////////////////////////////////////////////////// | |
| #include "stdafx.h" | |
| #ifdef _DEBUG | |
| #pragma comment(lib,"sfml-graphics-d.lib") | |
| #pragma comment(lib,"sfml-audio-d.lib") | |
| #pragma comment(lib,"sfml-system-d.lib") | |
| #pragma comment(lib,"sfml-window-d.lib") | |
| #pragma comment(lib,"sfml-network-d.lib") | |
| #else | |
| #pragma comment(lib,"sfml-graphics.lib") | |
| #pragma comment(lib,"sfml-audio.lib") | |
| #pragma comment(lib,"sfml-system.lib") | |
| #pragma comment(lib,"sfml-window.lib") | |
| #pragma comment(lib,"sfml-network.lib") | |
| #endif | |
| #pragma comment(lib,"opengl32.lib") | |
| #pragma comment(lib,"glu32.lib") | |
| #include "SFML/Graphics.hpp" | |
| #include "SFML/OpenGL.hpp" | |
| #include <iostream> | |
| //////////////////////////////////////////////////////////// | |
| ///Entrypoint of application | |
| //////////////////////////////////////////////////////////// | |
| void Draw_Cuboid(float,float,float); | |
| float CylinderX(float,float,float[],float[]); | |
| float CylinderY(float,float,float[],float[]); | |
| float CylinderZ(float,float,float[],float[]); | |
| int main() | |
| { | |
| // Create the main window | |
| sf::RenderWindow App(sf::VideoMode(600, 600, 32), "SFML OpenGL"); | |
| int width=600,height=600; | |
| // Create a clock for measuring time elapsed | |
| sf::Clock Clock; | |
| //prepare OpenGL surface for HSR | |
| glClearDepth(1.f); | |
| glClearColor(0.3f, 0.3f, 0.3f, 0.f); //background colour | |
| glEnable(GL_DEPTH_TEST); | |
| glDepthMask(GL_TRUE); | |
| //// Setup a perspective projection & Camera position | |
| glMatrixMode(GL_PROJECTION); | |
| glLoadIdentity(); | |
| //set up a 3D Perspective View volume | |
| gluPerspective(90.f, 1.f, 1.f, 300.0f);//fov, aspect, zNear, zFar | |
| //set up a orthographic projection same size as window | |
| //this means the vertex coordinates are in pixel space | |
| //glOrtho(0,800,0,600,0,100); // use pixel coordinates | |
| //glMatrixMode(GL_PROJECTION); // reset projection matrix | |
| //glLoadIdentity(); | |
| //calculate new prespective and aspect ratio | |
| //gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,1.0f,1000.0f); | |
| glMatrixMode(GL_MODELVIEW); // reset modelview matrix | |
| glLoadIdentity(); | |
| // Start game loop | |
| while (App.isOpen()) | |
| { | |
| // Process events | |
| sf::Event Event; | |
| while (App.pollEvent(Event)) | |
| { | |
| // Close window : exit | |
| if (Event.type == sf::Event::Closed) | |
| App.close(); | |
| // Escape key : exit | |
| if ((Event.type == sf::Event::KeyPressed) && (Event.key.code == sf::Keyboard::Escape)) | |
| App.close(); | |
| } | |
| //Prepare for drawing | |
| // Clear color and depth buffer | |
| glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); | |
| // Apply some transformations | |
| glMatrixMode(GL_MODELVIEW); | |
| glLoadIdentity(); | |
| glPointSize(2); | |
| gluLookAt( 0,0,70,// camera position | |
| 0,0,0, //look at this point | |
| 0,1,1); //camera up | |
| static float ang=0.0; | |
| glRotatef(ang,1,0,0); //spin about x-axis | |
| glRotatef(ang*2,0,1,0);//spin about y-axis | |
| ang+=0.01f; | |
| float p1[]={-15,20,15}; | |
| float p2[]={+25,20,15}; | |
| float TWO_PI=3.141*2; | |
| glBegin(GL_TRIANGLES); | |
| float dt=0.3; | |
| float dphi=0.2; | |
| //First set of triangles | |
| for(float t=0;t<=1;t+=dt){ | |
| //t=0; | |
| for(float phi=0;phi<TWO_PI;phi+=dphi){ | |
| glColor3d(1,0,0); | |
| glVertex3f( | |
| CylinderX(t,phi,p1,p2), | |
| CylinderY(t,phi,p1,p2), | |
| CylinderZ(t,phi,p1,p2)); | |
| glVertex3f( | |
| CylinderX(t,phi+dphi,p1,p2), | |
| CylinderY(t,phi+dphi,p1,p2), | |
| CylinderZ(t,phi+dphi,p1,p2)); | |
| glVertex3f( | |
| CylinderX(t+dt,phi,p1,p2), | |
| CylinderY(t+dt,phi,p1,p2), | |
| CylinderZ(t+dt,phi,p1,p2)); | |
| } | |
| } | |
| glEnd(); | |
| glBegin(GL_TRIANGLES); | |
| dt=0.3; | |
| dphi=0.2; | |
| //This draws the second set of triangles adjacent to the first set of triangles. | |
| //Done by incrementing/changing the first sets vertexs to adjacent positions | |
| for(float t=0;t<=1;t+=dt){ | |
| for(float phi=0;phi<TWO_PI;phi+=dphi){ | |
| glColor3d(0,1,0); | |
| glVertex3f( | |
| CylinderX(t,phi+dphi,p1,p2), | |
| CylinderY(t,phi+dphi,p1,p2), | |
| CylinderZ(t,phi+dphi,p1,p2)); | |
| glVertex3f( | |
| CylinderX(t+dt,phi+dphi,p1,p2), | |
| CylinderY(t+dt,phi+dphi,p1,p2), | |
| CylinderZ(t+dt,phi+dphi,p1,p2)); | |
| glVertex3f( | |
| CylinderX(t+dt,phi,p1,p2), | |
| CylinderY(t+dt,phi,p1,p2), | |
| CylinderZ(t+dt,phi,p1,p2)); | |
| } | |
| } | |
| glEnd(); | |
| glTranslatef(0,40,0);//move everyting after this line by 40 units along y-axis | |
| glRotatef(ang*5,0,0,1); //spin about z-axis | |
| // Finally, display rendered frame on screen | |
| App.display(); | |
| } | |
| return EXIT_SUCCESS; | |
| } | |
| float CylinderX(float t, float phi, float p1[3],float p2[3]){ | |
| return p1[0]*(1-t)+p2[0]*t; | |
| } | |
| float CylinderY(float t, float phi, float p1[3],float p2[3]){ | |
| float r=p1[1]*(1-t)+p2[1]*t; | |
| return r*cos(phi); | |
| } | |
| float CylinderZ(float t, float phi, float p1[3],float p2[3]){ | |
| float r=p1[1]*(1-t)+p2[1]*t; | |
| return r*sin(phi); | |
| } |
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