glut

Valid OpenGL context

瘦欲@ 提交于 2019-12-30 07:12:11
问题 How and at what stage is a valid OpenGL context created in my code? I'm getting errors on even simple OpenGL code. 回答1: From the posts on comp.graphics.api.opengl , it seems like most newbies burn their hands on their first OpenGL program. In most cases, the error is caused due to OpenGL functions being called even before a valid OpenGL context is created. OpenGL is a state machine. Only after the machine has been started and humming in the ready state, can it be put to work. Here is some

What is the nicest way to close FreeGLUT?

瘦欲@ 提交于 2019-12-30 04:15:08
问题 I'm really having trouble closing my console application with FreeGLUT. I would like to know what the best way is to take every possible closing, because I don't want any memory leaks (I'm pretty afraid of those). So I already tried the following, which is giving me an exception like this: First-chance exception at 0x754e6a6f in myProject.exe: 0x40010005: Control-C. int main(int argc, char **argv) { if( SetConsoleCtrlHandler( (PHANDLER_ROUTINE) CtrlHandler, true) ) { // more code here as well

python-OpenGL编程实例

一世执手 提交于 2019-12-29 19:23:57
1.黄色背景红色矩形 from OpenGL.GL import * from OpenGL.GLUT import * def draw(): glFlush() # 清空缓冲区,将指令送往硬件立即执行 glClearColor(1.0, 1.0, 0, 0) #设置清除颜色为黄色 glClear(GL_COLOR_BUFFER_BIT) #把窗口清除为当前颜色 glBegin(GL_POLYGON) #与glEnd()合用,GL_POLYGON表示绘制一个凸多边形,顶点1到n定义了这个多边形 glColor3f(1.0, 0, 0) #设置红色 glVertex2d(-0.5, -0.5) #坐标位置为(-0.5,-0.5) glVertex2d(-0.5, 0.5) glVertex2d(0.5, 0.5) glVertex2d(0.5, -0.5) glEnd() #绘制结束 glFlush() #将命令缓冲区的内容提交给硬件执行 if __name__ == "__main__": glutInit() #初始化glut库 glutCreateWindow('draw with OpenGL') #创建glut窗口 glutDisplayFunc(draw) #注册回调函数draw() glutMainLoop() #进入glut主循环 2. 白色背景渐变矩形 from

Simple OpenGL GUI Framework User Interaction Advice? [closed]

ぃ、小莉子 提交于 2019-12-29 09:13:11
问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago . I'm designing a simple GUI framework from scratch as a project, using OpenGL and nothing else external and need some advice on how I might implement user interaction. Basically, I've a base class GUIItem from which all elements inherit. This gives each item some basic

GLUT键盘控制(glutKeyboardFunc和glutSpecialFunc)

时光总嘲笑我的痴心妄想 提交于 2019-12-27 09:35:53
GLUT 教程 键盘输入 GLUT允许我们编写程序,在里面加入键盘输入控制,包括了普通键,和其他特殊键(如 F1,UP)。在这一章里我们将学习如何去检测哪个键被按下,可以从GLUT里得到些什么信息,和如何处理键盘输入。 到现在,你应该注意到了,只要你想控制一个事件的处理,你就必须提前告诉 GLUT,哪个函数将完成这个任务。到现在为止,我们已经使用GLUT告诉窗口系统,当窗口重绘时我们想调用哪个渲染函数,但系统空闲时,哪个函数被调用。和当窗口大小改变时,哪个函数又将被调用。 相似的,我们必须做同样的事来处理按键消息。我们必须使用 GLUT通知窗口系统,当某个键被按下时,哪个函数将完成所要求的操作。我们同样是调用一个函数注册相关的回调函数。 当你按下一个键后, GLUT提供了两个函数为这个键盘消息注册回调。第一个是glutKeyboardFunc。这个函数是告诉窗口系统,哪一个函数将会被调用来处理普通按键消息。 普通键是指字母,数字,和其他可以用 ASCII代码表示的键。函数原型如下: void glutKeyboardFunc(void(*func)(unsigned char key,int x,int y)); 参数: func: 处理普通按键消息的函数的名称。如果传递 NULL,则表示GLUT忽略普通按键消息。 这个作为

C Compile Error (No such file or directory, compilation terminated)

自闭症网瘾萝莉.ら 提交于 2019-12-25 12:19:18
问题 I'm on Windows trying to learn some OpenGL. I Installed mingw and have a test file. I put my test.c file in a glut folder, which contains glut files such as the glut32.dll and library file. I used mingw in cmd to run the file using this: gcc opengl.c -o opengl -lGL -lGLU -lglut And I got this error: opengl.c:1:23 fatal error: GLUT/glut.h: No such file or directory #include <GLUT/glut.h> compilation terminated. Not sure what I'm doing wrong, anybody know? Thanks! 回答1: First of all you need to

GLUT Warning and GLUT Fatal Error in a Python code that runs in another machine

雨燕双飞 提交于 2019-12-25 10:03:06
问题 I have to make some modifications in the following code as homework, however the professor shown the code running in class, but even after installing the packages it didn't run on my Mac machine, the error says to update my code, however it's supposed to run on his Windows machine also, so the ideal would be to fix the error and not the code. def main(): glutInit(sys.argv) #initial the system glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB) glutInitWindowSize(int(window_width), int(window_hight))

GLUT Warning and GLUT Fatal Error in a Python code that runs in another machine

空扰寡人 提交于 2019-12-25 10:03:06
问题 I have to make some modifications in the following code as homework, however the professor shown the code running in class, but even after installing the packages it didn't run on my Mac machine, the error says to update my code, however it's supposed to run on his Windows machine also, so the ideal would be to fix the error and not the code. def main(): glutInit(sys.argv) #initial the system glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB) glutInitWindowSize(int(window_width), int(window_hight))

error undefined reference to `FTExtrudeFont::FTExtrudeFont(char const*)' [duplicate]

江枫思渺然 提交于 2019-12-25 07:48:50
问题 This question already has answers here : What is an undefined reference/unresolved external symbol error and how do I fix it? (32 answers) Closed 2 years ago . while I am compiling my opengl code I am facing this error.how to remove this? all: sample2D sample2D: Sample_GL3_2D.cpp glad.c g++ -o sample2D Sample_GL3_2D.cpp glad.c -lGL -lglfw -ldl -std=c++11 clean: rm sample2D this is my contents of Makefile and my code for rendering the font const char* fontfile = "Monaco.ttf"; GL3Font.font =

DllNotFound Exception when I use glut functions in my Dll

自作多情 提交于 2019-12-25 05:49:18
问题 I have a c++ dll and c# application. In C# application I call function from dll. With simple function like: extern "C" { __declspec(dllexport) void HelloFromDll() { MessageBox(NULL, _T("Hello from DLL"), _T("Hello from DLL"), NULL); } } all works fine. When i use function with glut like this: extern "C" { __declspec(dllexport) int InitGlut() { glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA); glutInitWindowPosition(100,100); glutInitWindowSize(320,320); glutCreateWindow("MyWindow");