glut

问题 This question already has answers here : How do I draw text with GLUT / OpenGL in C++? (4 answers) Closed 6 years ago . How can I write text in GLUT and C++? 回答1: Drawing 3D character You can follow this tutorials http://videotutorialsrock.com/opengl_tutorial/draw_text/home.php For 2D character You can draw bitmap character here is the example http://codeincodeblock.blogspot.com/2011/11/bitmap-is-rectangular-array-of-0s-and.html 来源： https://stackoverflow.com/questions/15843832/how-can-i-write

问题 I am trying to get the 3D coordinates of a mouse click C++/OpengGL with the glut function glutMouseFunc(). So I created a function like this: void mouse(int button, int state, int x, int y){ if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) { mouse_x=x; mouse_y=y; } } The function gets the window coordinates of the click of the mouse and i use it with the glut function glutMouseFunc() like this: glutMouseFunc(mouse); My question is how would I modify the coordinates given by the mouse

问题 I have some problems understanding the specification for gluLookAt. For example the z-axis is defined as: F = ( centerX - eyeX, centerY - eyeY, centerZ - eyeZ ) with center being the point the camera looks at and eye being the position the camera is at. f = F / |F| and the View-Matrix M is defined as: ( x[0] x[1] x[2] 0 ) ( y[0] y[1] y[2] 0 ) (-f[0] -f[1] -f[2] 0 ) ( 0 0 0 1 ) with x and y being the x,y-axis and f being the z-axis If my camera is positioned at (0, 0, 5) and the camera looks

问题 I make OpenGL application that draw cube. I want to add anti aliasing but have no success. Maybe someone can help (User Xcode 6.1.1, GLUT, OpenGL) ? I need create antialiasing without ay external libraries. Result of code below. GLfloat xRotated, yRotated, zRotated; void init(void){ glClearColor(0,0,0,0); glEnable (GL_DEPTH_TEST); // Turn on antialiasing, and give hint to do the best // job possible. glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_BLEND); glEnable(GL_POINT

问题 I have the following code from genpfault answer on OpenGL - Rotate a 'Curve' About the Y-Axis, #include <GL/glut.h> #include <glm/glm.hpp> #include <vector> #include <cmath> using namespace std; using namespace glm; struct Vertex { Vertex( const vec3& position, const vec3& normal ) : position( position ) , normal( normal ) {} vec3 position; vec3 normal; }; // spin the pts array around the Z axis. // pts.x will become the radius, and pts.y will become the height // pts should be sorted by y

问题 I need the source code of gluCylinder and the function it calls so I can alter them. I did some google search but I didn't find anything. Can anyone point me to the right direction? 回答1: It's right there in the mesa git tree: void GLAPIENTRY gluCylinder(GLUquadric *qobj, GLdouble baseRadius, GLdouble topRadius, GLdouble height, GLint slices, GLint stacks) { GLint i,j; GLfloat sinCache[CACHE_SIZE]; GLfloat cosCache[CACHE_SIZE]; GLfloat sinCache2[CACHE_SIZE]; GLfloat cosCache2[CACHE_SIZE];

问题 I would like to know how to draw a cylinder with flat shading. This is what I've done so far. void drawCylinder(int numMajor, int numMinor, float height, float radius) { double majorStep = height / numMajor; double minorStep = 2.0 * M_PI / numMinor; int i, j; for (i = 0; i < numMajor; ++i) { float z0 = 0.5 * height - i * majorStep; float z1 = z0 - majorStep; glBegin(GL_TRIANGLE_STRIP); for (j = 0; j <= numMinor; ++j) { double a = j * minorStep; float x = radius * cos(a); float y = radius *

问题 I want to model the (biological) cell division process. I have been able to create a 3D cell model and load the model (using glm library). However, I do not know how to make it divide and I don't know where to start. Does any one know how to make the effect that things replicate in OpenGL? (It is great if I can use glut and glm for that). Maybe you could just show me how to make a sphere replicate. 回答1: I think what you're looking for is called meta-particles or meta-balls. I think that by

问题 All, I am trying to load up a bmp file into a GLubyte array (without using aux). It is unbelievable how what I thought would have been a trivial task is sucking up hours of my time. Can't seem to find anything on Google! This is what I hacked together but it's not quite working: // load texture GLubyte *customTexture; string fileName("C:\\Development\\Visual Studio 2008\\Projects\\OpenGL_Test\\Crate.bmp"); // Use LoadImage() to get the image loaded into a DIBSection HBITMAP hBitmap = (HBITMAP

问题 In part 1 we read the SBM file format successfully, this is part 2 on how to read the KTX file format. Update: June 25, 2019, the below code to read the ktx file format does work. The file is ktxloader.py Though the code is still a work in progress. Any comments on it would be appreciated. The code below is a working example to create and modify ktxloader.py Files required: pattern1.ktx is our KTX file, to be read this program torus_nrms_tc.sbm is our SBM file solved in part1 in a folder