Questions tagged [vertex]
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, tangents etc of the points defining the triangular faces of 3D-meshes.
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Vulkan vertex from back peeking through
I am trying to render a .obj model with Vulkan 1.4. The object is rotated with a quaternion over time. The "front" geometry of the model is rendered as ...
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OpenGL vertex normalization issue on MAC OS;
I am trying to learn OpenGL and this is my attempt to create a hello triangle program but no matter what the vertices are not normalized I when I have the set to 1,0,0 or something the vertex is not ...
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How can I calculate vertex positions for a rectangle outline using a unit square, vertex normals, model matrix and outline thickness?
I'm trying to draw a hollow rectangle (i.e. the border of a rectangle without the middle) using a unit square plus normals. The actual positions are being calculated in my vertex shader.
For example, ...
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Vertex sorting to match triangle list definition of an hexagon
I’m working on a project to display molecules with DirectX that I’m updating regularly to add visual effects. The one I’m working on is simple: display a flat transparent hexagon that match a ...
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GameObject mesh.vertices array is empty
I've an Icosphere GameObject:
I want to iterate over each of the faces and change the material based on their distance from the center, however I don't seem to be able to retrieve the list of ...
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How to get rid of color border in linear gradient texture 2d
I'm trying to use a linear gradient to displace a plane mesh via vertex displacement in the visual shader editor. However, the linear gradient always seems to drop back to the start color just before ...
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Problems with reflection angles during collision resolution between circle and rectangle vertices (2D)
I'm having a hard time trying to resolve the reflexion angles when the ball collides with one of the brick's corners (square vertices) in my brick breaker game.
The collision detection system is ...
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Vertex color values are not smoothly transitioning/interpolating in Godot shader
I'm trying to write a shader for terrain that will color the mesh based on slope angle, ie color the sides of mountains or other steep surfaces a different color than the ground. In my shader I am ...
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What is the purpose of tangent and bitangent vertex attributes?
Every vertex of a 3D mesh has position and some optional values like texture coordinates, vertex color, and normal, but also tangent and bitangent vectors.
While the purposes of texture coords, vertex ...
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Having trouble implementing edge collapse operation with half-edge data structure
I'm trying to make a half-edge data structure to interact with meshes in 2D space in Unity but I'm having trouble with implementing an edge collapse operation that merges one vertex into its twin half-...
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I want to cut a pizza slice out of a 2D circle using mouse input in Unity. What data structures and geometric formulas would be best for this?
I understand this is probably not an easy task considering I haven't found any code examples online that do something like this but if I wanted to take in mouse input lets say during a drag and use ...
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How do I cut mesh partially with EzySlice?
I'm using the EzySlice framework to cut meshes (https://github.com/DavidArayan/ezy-slice).
So far it can cut a mesh but infinitely but I want to be able to cut partially like this:
As you see in the ...
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How can I distort a 2D mesh when moving one (or more) vertices?
I use Blender to show examples. I want to do this in Unity on runtime.
The outside corner vertex will be moved passed edge and the triangles appearance will be messed up like it shows on the second ...
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How do I distinguish edge vertices?
I'm trying to displace the vertices highlighted in red but the way I'm selecting the vertices for displacement is by a distance radius based on the position I click with my mouse and I end up ...
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How do I find the correct vectors perpendicular to a vector in between two vertices?
I'm trying to push the purple vertices inward by moving it with a vector perpendicular to the red vector shown in the picture.
Each directional vector created will move its respective vertex towards ...
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How can I roll up a plane like paper?
Hello, I want to twist the plane. The plane looks like this when I try to do it the way I linked below.
How can I my plane roll like photos?
How can I roll up a plane with a vertex shader?
you can see ...
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How to handle normal vector when duplicating vertex?
I'm currently developing a UV mapping, such as the UVW Map Modifier in 3ds Max (Not Unwrap UVW Modifier).
I split the vertices of the model in the form of a primitive shape (Box, Plane, etc.) and set ...
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Generate plane with script missing triangles
I am trying to do a simple script to generate a plane from a script by creating a new mesh. After trying it, it seems like some of the triangles aren't showing up. I checked if they were in the list ...
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Calculate UV sphere vertices (altitude)
There is an fantastic answer by DMGregory here where he explains how to calculate and generate the vertices of an UV Sphere: OpenGL calculate UV sphere vertices
Based on his code, how can we change ...
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How do I create and animate simple polygons directly from code in Unity?
I'm a beginner with Unity, but I know how to code. I'm open to tutorials, of course.
Ideally, I would like to code spacial vertices and connect them into a simple polygon. The polygon would then be ...
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Unity Vertex Color Shader with Transparency
I'm trying to achieve a simple effect: I have a cube mesh and I want some of the vertices to change color. In this case, I want it to form some sort of a gradient where the unchanged vertices are set ...
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Vertices in index buffer not rendered
I'm beginning with the 3D rendering in Monogame and i'm facing not a real issue because i already find a way to bypass it but more of a question.
I'm rendering a simple cube with 8 vertices like that:...
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XNA 4.0 How to combine triangles vertices 3D
Preview for the problem:
I'm making a similar game to Minecraft (a game that it's world is made by cubes), but the fps of the game is getting low only by rendering a little amount of cubes in the ...
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How to inflate geometry?
I have a shape containing vertices and triangles
I want to inflate that geometry using some radius to get something like that
I should move each point along ...
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Algorithms for calculating vertex normals in 2D polygon
I have the points of a 2D polygon in the order in which they are connected, and I need to calculate the vertex normals and move them along it. An example is shown.
I would like to know how to ...
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