glut

问题 This question already has answers here : GLUT is just rendering a blank white screen? (2 answers) Closed 6 years ago . When I compile it, it makes a blank blac screen, if I take out glut swap buffers from either location, or both at the same time I get a blank white screen, whats the problem? #ifdef __APPLE__ #include <GLUT/glut.h> #else #include <GL/glut.h> #endif #include <stdlib.h> void ProcessSpecialKeys(int key, int x, int y){ switch(key){ case GLUT_KEY_RIGHT: exit(0); case GLUT_KEY_LEFT

问题 I created this program where the user clicks the right click of the mouse and he gets a menu where he can choose to draw a cube or a sphere in a perspective projection I would like him to be able to change the perspective projection to orthogonal projection. I want the shapes to be placed in the same spot just with orthogonal projection. I want him to be able to do it by clicking "O" in the keyboard and go back to perspective by clicking "p". how do I mix the orthogonal projection in this

问题 I have a DLL written in C++ that uses FreeGlut to visualize some data. I want to change the icon of the main (free)glut window. I've read that it is impossible, but in the docs I see: GLUT_ICON - specifies the icon that goes in the upper left-hand corner of the freeglut windows. How can I change icon for (free)glut window, if possible? 回答1: OK, I did it: Create a Resource for the project and add an 32x32 icon (edit it or import). This icon will get the ID equal to IDI_ICON1 . Include the

问题 How to display a glut window inside Windows Form? glutCreateWindow("Example") create another form, glutCreateSubWindow(hwnd, 0, 0, 100, 100), where hwnd is handle to my main Window Form in C#, i get an AccessViolation Exception. The Glut program is in a C++ DLL. My application is on C# WPF. I need to display glut view at my C# Form C++ code: extern "C" { __declspec(dllexport) int InitGlut(int hwnd, int top, int left, int width, int height) { glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT

问题 Just 4 little lines causing a problem with the alien rain program that I ported from the OpenGL Superbible. It seems I am having issues trying to write to memory after using the function glMapBufferRange Update: Excellent code by Rabbid76 has solved the problem and provided valuable insight of explanation. Thank You. Required files: ktxloader.py , aliens.ktx Source code of alienrain.py #!/usr/bin/python3 import sys import time sys.path.append("./shared") #from sbmloader import SBMObject #

问题 I am working on a Mac, I've got FreeGlut compiled and installed, but I can't seem to get the OpenGL 3.2 context with it. However, I can get it without any problem while using GLFW. So in GLFW, this code works perfectly fine: glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3); glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 2); glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); glfwOpenWindow(500, 500, 8, 8, 8, 8, 24, 8, GLFW_WINDOW) But with FreeGlut, this code fails(on

问题 I have an OpenGL project which uses GLUT (not freeglut) wherein I would like to display 2D text on the viewport at a fixed location. The rest of my objects are in 3D world co-ordinates. This answer to a related old question says that, the bitmap fonts which ship with GLUT are simple 2D fonts and are not suitable for display inside your 3D environment. However, they're perfect for text that needs to be overlayed on the display window. I've tried the approach outlined in the accepted answer,

问题 I'm programming in C with GLUT and OPENGL, i want my window redrawing itself again and again. I know that i can rerender with glutPostRedisplay() , if I put it in the idle function of Glut my pc lags. My code is following atm void on_idle() { glutPostRedisplay(); } void on_draw() { ... glClearColor(1.f, 1.f, 1.f, 1.f); glClear(GL_COLOR_BUFFER_BIT); ... glFlush(); } int main(int argc, char** argv) { ... glutDisplayFunc(&on_draw); glutIdleFunc(&on_idle); ... } 回答1: Try this: void on_timer(int

问题 I want to rotate a simple cube in OpenGL using GLUT in C. The rotation will occur when I press a key. If I use glRotatef(angle, 0.0f, 1.0f, 0.0f) the cube will rotate instantly without an animation. I would like to rotate it slowly so it takes about 2 seconds to complete the rotation. 回答1: Create a keyboard callback that toggles a bool and a timer callback that updates an angle: #include <GL/glut.h> char spin = 0; void keyboard( unsigned char key, int x, int y ) { if( key == ' ' ) { spin =

问题 i have tried to implement the data transfer between usb and cpu in this project. The data transfer is being shown as a small rectangle moving from one component of the computer to another. In the code below, the GlutPostRedisplay does not work. Also, can someone tell me if sleep() used is correct because the functions called in display do not work in sync. casing() is never executed. After fisrtscreen(), it directly jumps to opened() and operate() does not work. what is the error with this