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Questions tagged [opengl-4]

OpenGL 4 is the current iteration of the OpenGL standard, designed to reflect newest capabilities of modern GPU in 3D rendering. OpenGL 4 requires DX11 level hardware.

OpenGL 4 is the current iteration of the OpenGL () standard, designed to reflect newest capabilities of modern GPU in 3D rendering. OpenGL 4 requires DX11 () level hardware. The major features of GL4 include: hardware tesselation support, ability to dynamically link shader subroutines, ability to set individual blend equations and blend functions for each color output and a mechanism to supply the arguments to certain Draw functions from buffer-object memory.

Release Dates:

  • OpenGL 4.0: March 11, 2010
  • OpenGL 4.1: July 26, 2010
  • OpenGL 4.2: August 8, 2011
  • OpenGL 4.3: August 6, 2012
  • OpenGL 4.4: July 22, 2013
  • OpenGL 4.5: August 11, 2014
  • OpenGL 4.6: July 31, 2017
426 questions
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opengl difference setting value in layout location or uniform variable

i am trying to get myself familiar with opengl programming. I cant stop wondering when should i use layout for variable input to a shader (with glVertexAttribPointer) vs just setting an uniform with glUniform. What are the advantage and when should…
pccash
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Binding error with OpenGL buffers and Direct State Access (DSA)

I got this error from OpenGL when I use glNamedBufferStorage() : GL_INVALID_OPERATION error generated. Buffer must be bound. Normally I don't have to use glBindBuffer() with direct state access !? Here is my gl call sequence : glCreateBuffers(1,…
Sébastien Bémelmans
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Find the maximum float in the array

I have a compute shader program which looks for the maximum value in the float array. it uses reduction (compare two values and save the bigger one to the output buffer). Now I am not quite sure how to run this program from the Java code (using…
Artholl
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Modern OpenGL with SDL2: How to draw a triangle

I am using SDL2 and my intention is to draw a simple triangle using modern OpenGL. Using modern OpenGL means not to use deprecated functions such as glBegin/glEnd etc. My tutorial source is http://www.opengl-tutorial.org. My code: int main(int ac,…
Anonymous
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How can I use instancing to generate 2 single different texture?

For example, I have two transform matrix: WVP_Left and WVP_Right. Can I render geometry (like a rabbit) using instancing to generate left texture and right texture? The left texture should just have only one rabbit with the WVP_Left effect, and the…
Xin YANG
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Opengl4 : how pass matrix4x4 by attributes way

I need your help for a simple thing to do (I hope) when passing Matrices4x4 by VBO and get it in the shader (version 4.3). I don't know how to do exactly. I have my version of code like it : void GLWidget::initializeGL() { // Set up the rendering…
chtimy
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OpenGL generate triangle mesh

I am a beginner at OpenGl and I am trying to draw a triangle mesh in OpenGL like this and my problem is that it is not drawing and I cannot see why. Also if I print the array of vertices the x- and y-coordinate remain the same for all vertices. Both…
Marcus
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creating my own projection matrix in opengl

Here is my reasoning: openGL draws everything within a 2x2x2 cube the x,y values inside this cube determine where the point is drawn on the screen. The z value is used for other stuff... if you want the z value to have some effect on perspective…
Theo Walton
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How to set a unit for an object in OpenGL

I'm learning OpenGL and I'm a bit confused about setting vertex data position. For instance, I want to draw a rectangle size 300mm x 300mm, as I understand, I can assume 1 OpenGL unit = 1 mm and then I set the vertex data like this: data = [-0.5, …
ryanvolap
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Opengl 4 debug output does not work

I am writing a game. I use ArchLinux most of time but I have tried to run my game on the Ubuntu 16.04 recently. On Ubuntu 16.04 there is a strange error: 1280. It is too difficult to find what causes the error so I wanted to see opengl's debug…
VP.
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Passing data through shaders

How it possible to pass data through shaders, when using vertex, tess. control, tess. evaluation, geometry and fragment shaders. I've tried using interface block this way. //vertex shaders out VS_OUT { ... } vs_out; Than I wrote this code in…
Peter
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Tessellation with glPrimitiveRestartIndex()?

I'm trying to draw cube using tessellation and primitive restart index. With using primitive restart index I can reduce index count down to 17, and draw cube with something like…
Peter
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Compiling a C program that uses OpenGl 4 in Mac OS X

So I am learning OpenGL 4 from openglbook. I copied and pasted the simple window creating program in my editor and followed Compiling OpenGL programs on OS X by using gcc -o hello hello.c -framework OpenGL -framework GLUT I got the following…
gjjhhh_
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glsl UNEXPECTED NEW_IDENTIFIER, expecting $end

I'm experimenting this frustrating error while compiling a fragment shader. If I try to compile the shader as it is : #version 450 core in vec2 tex_coord; in flat int vertex_id; out vec4 color; layout (binding = 20) uniform sampler2D…
Andrea Loforte
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how can I update vbo data larger than current vbo buffer size?

I generated a vbo buffer (vertex buffer) object called object_A, let's assume that object_A contains 10 vertices (30 floats). Now I want to update object_A using glMapBuffer with 20 vertices (60 floats), can I use glMapBuffer?
Damons
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