I'm generating terrain in Opengl geometry shader and am having trouble calculating normals for lighting. I'm generating the terrain dynamically each frame with a perlin noise function implemented i...

I have drawn a triangle mesh with 10000 vertices(100x100) and it will be a grass ground. I used gldrawelements() for it. I have looked all day and still can't understand how to calculate the normal...

I have cloned and than flipped an object using negative scale, which causes my single sided faces to inverse. My question is, how can i flip the normals too? I don't want to use material.side = TH...

As the title says I want to calculate the surface normals of a given depth image by using the cross product of neighboring pixels. I would like to use Opencv for that and avoid using PCL however, I...

I'm creating a terrain mesh, and following this SO answer I'm trying to migrate my CPU computed normals to a shader based version, in order to improve performances by reducing my mesh resolution an...

I am trying to write a obj file with vertices. I am computing the vertex normals in my code and writing to this file as well. When I try to render this file in Meshlab it reads the vertices correct...

I have been searching around and haven't found any really good answer to my question yet.. The thing is that I have this sphere.. just a basic sphere, and I want to flip the normals so the sphere g...

What is the proper way to transform surface normals defined in world space to normals in screen space? I don't think they can simply be multiplied by the projection matrix, because perspective divi...

I've looked online for quite some time and can't find an answer to this. For simplicity, let's just assume I need to fully smooth out the normals of a group of cojoined faces. I want to find the ac...

edit: you might want to start at "Edit 3" because I've solved a lot of this Here's a screenshot of my normal cubemap applied to an icosphere: The tangents for my cubemapped icosphere are genera...

I am writing a plugin which renders some meshes in OpenGL.I have a Vertices array in a VBO and an Indices array in another VBO. I now want to store Normals. As a vertex, being shared between multip...

Given a convex polyhedron with defined vertices (x, y, z) that specifies the faces of the polyhedron. How can I go about calculating the surface normal of each face of the polyhedron? I need the ...

I heard that I should use normals instead of colors, because colors are deprecated. (Is that true?) Normals have something to do with the reflection of light, but I can't find a clear and intuitive...

I have a triangulated polyhedron (not necessarily convex) and the following information: A list of the position of each vertex. A list of the vertex triples that define each face. A list of the ve...

I have a small problem calculating normals for my heightmap. It has a strange behavior. At the higher and the lower points the normals are fine, but in the middle they seem wrong. They are lighted ...

I am trying to export a skinned mesh. For some reasones FbxSDK breaks normals on edges of segments if I add a skin cluster to a mesh. Without a skin everything looks totally fine. Example: Code...

For my project, I need to create materials at run time. When I create material, Normal map has no effect. I tried the two solutions about this but they did not work for me. Is something has changed...

I'm writing a BezierPath class that contains a list of BezierPoints. Each BezierPoint has a position, an inTangent and an outTangent: BezierPath contains functions for getting linear positions a...

Inspired by crytek's presentation on using quaternions to store tangent space in quaternions for smaller vertices, I came to the logical conclusion that if you can use quaternions to store tangent ...

I am trying to get mesh normals and lights working in LibGDX project. I already have textured mesh generated from heightmap texture pixels. The problem is I cannot get normals lighted up correctl...

I've been trying to realize a mesh that has all face normals pointing outward. In order to realize this, I load a mesh from a *.ctm file, then walk over all triangles to determine the normal using ...

I am trying to render a 3D model (from volvis.org) with Gouraud shading using the marching cubes algorithm. So far I have the normals for each vertex with: GetNormalForVertex(vertex &b, vertex...

I am doing the following to try and estimate surface normals from a point cloud generated from a Kinect depth image: pcl::PointCloud<pcl::PointXYZRGB>::Ptr create_point_cloud_ptr(Mat& de...

We are given a set of triangles. Each triangle is a triplet of points. Each point is a triplet of real numbers. We can calculate surface normal for each triangle. For Gouraud shading however, we ne...

I have a scene with several models with individual positions and rotations. Given normals, the shaders apply simple bidirectional lighting to each pixel. That is my vertex shader. #version 150 i...