Questions tagged [vertex-buffer]
The vertex-buffer tag has no summary.
71 questions
3
votes
1
answer
310
views
Is it possible to use a pre-existing texture buffer containing vertex data to initialise a vertex buffer for rendering in OpenGL v4.6?
I'm generating a heightmap in a compute shader in OpenGL v4.6 and storing it to a texture.
Lets say I actually store the full vertex data in that texture instead of just the height, which is a trivial ...
0
votes
1
answer
501
views
"An ID3D12Resource object is referenced by GPU operations in-flight on Command Queue": When Should I Create my Buffers?
When trying to re-create my vertex buffers, my app crashes and I get this error:
D3D12 ERROR: ID3D12Resource2::: CORRUPTION: An ID3D12Resource object (0x000001DDEBA98FC0:'Vertex Buffer Default ...
- 150
0
votes
2
answers
405
views
Cannot Draw a triangle without VAO on MacOS
So I was watching Cherno's Video on Vertex attributes and he was successful in drawing a triangle without a VAO, but in tutorials from learnopengl.com they specifically say they we need a VAO to draw ...
- 183
1
vote
1
answer
557
views
How do rendering pipelines improve the performance of updating all the vertices every frame?
Let's say I am implementing a simple game engine, particularly the rendering part. From the high-level view we have some vertices which are copied to the graphics card alongside shader information etc....
- 113
0
votes
0
answers
564
views
glDrawArrays: Erasing the buffer between calls?
I have two VBOs, assigned to names 1 and 2. Only 2 is being drawn. However, if I comment out VBO 2, VBO 1 is drawn with no problem. Here's the relevant code.
...
- 135
1
vote
0
answers
768
views
OpenGL VAO buffer rebinding vs binding switching
I'm considering two different approaches to vertex buffer management in my OpenGL game engine. The first one seems to be pretty usual, but I haven't seen the second one being proposed or used anywhere....
- 111
-1
votes
1
answer
158
views
The types of buffers typically used in robust WebGL/OpenGL apps
I am trying to get a feel for how to structure WebGL/OpenGL apps and have been looking through sources for the types of buffers they use. I've found these:
uvs
occlusion
noise
bitangents
tangents
...
- 133
1
vote
1
answer
5k
views
Unreal 4 - How to access and iterate through the polygons of a mesh?
I'm newbie with Unreal Engine 4. I need to create a function which calculates the volume of a mesh, based on the following example:
https://n-e-r-v-o-u-s.com/blog/?p=4415
To achieve that I created ...
1
vote
1
answer
2k
views
VAO and VBO connection and granularity with multiple objects
How general should vertex array objects be?
I'd like to plan ahead and avoid a major revision down the road. I'm having a hard time wrapping my head around a few (possibly conflicting) pieces of ...
- 123
2
votes
2
answers
797
views
How does OpenGL know which buffer to draw?
I have been trying out some OpenGL things and was wondering something:
How does OpenGL know which buffer to draw when glDrawElements is called (since there are ...
user110167
2
votes
1
answer
196
views
Can GPU draw from one VB and upload to another VB at the same time? (OpenGL)
We have a working implementation of vertex double buffering, rendering from one buffer and uploading vertex data to next frame buffer at the same time.
However I am concerned that CPU spends quite a ...
- 123
0
votes
1
answer
96
views
DirectX Assembler Stage, passing same data
I'm having problems with the Input Assembler.
The first time the data is passed through the pipeline, everything is fine.
But, when the index buffer (with a diffrent/higher index than before) refers ...
1
vote
1
answer
455
views
Multiple buffers and calling glBufferSubData
Originally asked this on Computer Graphics, but it might fit in better here.
In my project, for convenience I would like to use many buffers.
Many buffers in my case means 50-100 terrain patches ...
- 113
0
votes
1
answer
264
views
Data overwritten in MapSubresource() method
I am trying to dynamically update the vertex buffer in a UWP project using SharpDX, once every time I call the following method, where context is the device context member.
...
- 155
2
votes
1
answer
279
views
How do I draw a high-performanced scatter plot
I am new to DirectX and currently I'm trying to use it for data visualization, to be specific, a 3D scatter plot. There are very limited resources on the internet, and I have read part of Frank D Luna'...
- 155
0
votes
1
answer
823
views
In game engine, how to get the vertices buffers of different vertex formats for render from the mesh file properly?
I'm a fresher on engine programming. I have a question of how we can get the vertices buffers of vertex formats from the mesh file.
For example, in OBJ file or FBX file, we save the positions, ...
- 3
1
vote
0
answers
449
views
Drawing multiple polygons with vertex buffer object
I tried to create program in which I would draw multiplepoygons
here is fragment of what I have done:
GLuint VertexArrayID;
exampleof drawing triangle(I have ...
- 11
8
votes
0
answers
450
views
How to draw Shadow Volumes in one draw call?
I've got a simple app that draws 3D cubes using instance rendering and I'm implementing Shadow Volume. Each cube's vertex, uv, normal and index data are statically stored in 4 vertex array buffers. On ...
- 458
1
vote
1
answer
409
views
ID3D11Buffer and std::array : buffer looks empty
I am having trouble at rendering vertices stored in a std::vector.
...
- 257
1
vote
2
answers
1k
views
How to handle mesh update in its vertex buffer
suppose i have a mesh, it can undergo any kind of changes - bend, stretch, even been torn. How should i update vertex buffer in DirectX for this mesh. For now i recreate it every time, and i don't see ...
- 169
1
vote
1
answer
505
views
How to retrieve vertex information from ID3DXMesh
I need to know the position of each vertex (and triangles) from a mesh (a pointer to ID3DXMesh, created by calling functions like ...
- 137
0
votes
1
answer
485
views
Making multiple VertexPositionColor variables in the same class? - XNA
I have studying XNA on my spare time for about a year now and I could use some professional help on this issue. Any time given to my problem is appreciated.
I have two VertexPositionColor variables ...
1
vote
1
answer
251
views
How to fix model matrices colliding in vertex shader?
I am new to OpenGL programming and I'm writing some basic code to display a few objects onto a screen.
I have a pyramid shape that I'm displaying, as well as a box shape that I am displaying. The ...
- 11
0
votes
3
answers
2k
views
Can I mix the use of VAO and direct usage of glVertexAttribPointer?
Let's say I am not using VAOs. I have an array of vertex positions in memory that I want to send to the shader. I do the following (assume I have enabled the corresponding vertex attrib arrays):
<...
- 2,159
0
votes
1
answer
363
views
What data to store along a vertex
Is there any other recommended data I should store in the vertex buffers aside from a vertex' coordinates, normals and texture coordinates?
For example data I'd need for a feature that almost every ...
- 125