There is an floating point precision issue in your code. When 2 floating point values are tested for equality, then an epsilon should be used: e.g. A == B should be done like fabs(A-B) < espi where A and B are floating point numbers and espi is a very small value. Change your code like … Read more
The problem has nothing to do with the VAO, but with the VBO. Since you pass a pointer to the constructor: void GSMesh::build(GLfloat *arrFVertex, GSShader *shader, int _intNumVertex) { glBufferData(GL_ARRAY_BUFFER, sizeof(arrFVertex), arrFVertex, GL_STATIC_DRAW); } sizeof(arrFVertex) = sizeof(GLfloat*) which is the size of the pointer, not the size of the array pointed to. The correct code … Read more
You don’t have to re-use the linked program(s), it’s just usually much faster than re-compiling/linking them each frame/drawcall. 3 solved Is it necessary to create couple program OpenGL? [closed]
Face culling This works only for single convex strict winding rule mesh without holes! The idea is that sign of dot product of 2 vectors will tell you if the vectors are opposite or not. So if we have a normal pointing out and view direction their dot should be negative for faces turned towards … Read more
Not necessarily the best way, but if you just need to get something working, you can modify your circle code slightly. Add a float arc_length parameter to the function signature. Replace 2.0f * 3.1415926f with arc_length. If you need to start the arc at a given offset, you can add another parameter called float arc_start. … Read more
This just shows a blank black screen, and if I do not put glutSwapBuffers() in both places it shows a blank white screen? [duplicate] solved This just shows a blank black screen, and if I do not put glutSwapBuffers() in both places it shows a blank white screen? [duplicate]
You are using a cross-compiler for Windows, and you are trying to run the binary on Linux (I assume ubantu is a linux distribution). Just use normal g++ from apt-get install g++. Here’s a GLFW usage example, if you’d like to see some code. GLFW is cross-OS, so it will still work when compiled on … Read more
I’m guessing you have all of your textures on on image? Near the edge of the block, OpenGL is sampling nearby pixels to make it smooth, so on the edge of your dirt block you can see it slightly fading into a stone block try the lwjgl version of this: glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST) glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, … Read more