In geometry a vertex is a point defining the corners of polygons or intersections of lines. A triangle for example is defined by 3 vertices with lines between them. In 3D-graphical APIs like OpenGL and Direct3D a vertex is a data structure containing information about the positions, normals, colors,...

learn more… | top users | synonyms

1
vote
3answers
88 views

Process of writing to the depth texture

In openGL, let's say I output one single point from the vertex shader with this value gl_Position = vec4(2.0,3.0,5.0,7.0); what exact math operations happen to "z" after leaving the vertex shader? ...
1
vote
1answer
271 views

Vertex ordering with THREEjs's exporter

I'm using THREEjs's exporter to export a 2D polygon plane. The resulting JSON gives me the vertices. I'm trying to properly order these vertices as to make the actual polygon shape, without luck. ...
0
votes
1answer
77 views

Loading non-skeletal animation to opengl via assimp

I'm a newbie in assimp and openGL. I'm trying to import .fbx or .dae formatted file to openGL via assimp. Importing skeletal animation was kind of easy. Lots of introductions and sample projects ...
0
votes
1answer
479 views

How to update “dynamicVertexBuffer” correctly with “setdata” on XNA?

I developed a small 3d games xna and uses a "DynamicVertexBuffer" and "DynamicIndexBuffer" to store and draw my vertices. Everything works fine, but my problem is the "Update" function where I update ...
2
votes
0answers
33 views

Weird warping with per-vertex normals

I've had this little problem for a while now, where for some reason my calculations for per-vertex normals results in a weird distortion or warping, skewing my lighting, shading, and reflection passes....
2
votes
0answers
258 views

Vertex Normals, Loading Mesh Data

My test FBX mesh is a cube. From what I surmise, it seems that the cube is on the extreme end of this issue, but I believe that the same issue would be able to occur in any mesh: Each vertex has 3 ...
1
vote
0answers
47 views

indices for surface of revolution

I'd like to implement a surface of revolution. I already implemented creating Vertices based on a 2D line. I now want to get the indices to render the mesh with GL_TRIANGLES Here's the code to ...
1
vote
0answers
41 views

Detecting the two Vector3 that determine the bottom-edge of the side of a box-collider that had collision (with C#)

So, I understand that plenty of questions have been posted on how to detect which side of a Box Collider had collision. However, what I am trying to achieve is a little different. I want to find out, ...
1
vote
0answers
235 views

Vertex shader to Pixel shader NVIDIA problem - restarting drivers

I have problem with my shader on NVIDIA cards. On AMD it's working right. Shader Builder exported CODE: //ROOT //PSParts //VSParts //Samplers sampler sLod23ColorGround : register(s0); sampler ...
0
votes
0answers
28 views

How to prevent object from moving when it's mesh/collider is being updated?

So I a made a script that lets the player grab a vertex, move it, and then update the mesh. To help prevent the player from trying to clip it through other objects I made it so the mesh/collider is ...
0
votes
0answers
22 views

How to apply individual colours in a fragment shader?

I'm trying to write my own shader. Within the target mesh I have assigned the following attributes in a script: mesh.vertices = points; mesh.colors = colours; //Each element of the array hold a ...
0
votes
0answers
33 views

How to get vectices of a sprite in correct order in Unity?

Currently, when I examine sprite.vertices, I see that it is ordered in crossed way, like: one from bottom, one from up, another one from somewhere else... etc. I need the correct order to make array ...
0
votes
0answers
24 views

JAVA lwjgl 3D Quadmap engine help

I've been trying to make a custom generated level engine that creates a custom flat surface. With my current knowledge of vertices and indices i have successfully created a rectangular surface. My ...
0
votes
0answers
36 views

Specify Vertex Quality in OBJ File

I've got a program that prints OBJ files in the format # x y z r g b format opens with MeshLab only (http://meshlab.sourceforge.net/) v xVal yVal zVal rVal gVal bVal v xVal yVal zVal rVal gVal bVal ...
0
votes
0answers
156 views

Invalid operation (1282) in GLSL vertex shader

My GLSL vertex shader works fine, but you if put a for loop inside or rename the uniform xxx to something else, it says the follwoing: Exception in thread "main" org.lwjgl.opengl.OpenGLException: ...
0
votes
0answers
215 views

What limits the number of vertices the GPU can process per clock cycle?

I am currently experimenting with OpenGL to make my own game. I wrote some test code to see what are the limits of my GPU. I own a Geforce 840m. This essentially consists of a draw command ...