You have a couple of choices: You can mix the images on the javascript side using canvas tools, and create a single material with a single texture map. You can achieve a multi-texture effect with a custom ShaderMaterial. Have two texture inputs, and implement color mixing in the shader. Here an example of just about … Read more
The purpose of meshgrid is to create a rectangular grid out of an array of x values and an array of y values. So, for example, if we want to create a grid where we have a point at each integer value between 0 and 4 in both the x and y directions. To create … Read more
For simplicity let us consider a list of n 3D points (point cloud) as input (instead of mesh) which is enough for polygonal meshes. The “diagonal” of the mesh is just line between 2 most distant points in the mesh. That is easily computable with trivial O(n^2) brute force search (2 nested for loops remembering … Read more
The way coloring works in JavaFX 3D meshes is by the material you assign them. For one mesh there’s one material, and it’s not possible to assing different materials to different triangles of the same mesh. So if you want to avoid textures, I’m afraid the only way is grouping triangles with the same color … Read more
You asked this a while back but I have a good solution if you are still looking. Instead of loading an obj file, you can easily convert it into arrays for the vertices, normals and texture coordinates. There’s a tool which converts obj files to c header files. You can convert the output to work … Read more
While you believe that the problem has nothing to do with storing the objects in a vector, I have a strong feeling that it probably does. The way you are encapsulating OpenGL objects in C++ wrappers is a recipe for pain, and you’re probably finding out like many did before you. The typical problems are … Read more
To render both a model and its wireframe, you can use a pattern like this one: // mesh var material = new THREE.MeshPhongMaterial( { color: 0xff0000, polygonOffset: true, polygonOffsetFactor: 1, // positive value pushes polygon further away polygonOffsetUnits: 1 } ); var mesh = new THREE.Mesh( geometry, material ); scene.add( mesh ) // wireframe var … Read more
File types that use separate indices for vertices and normals do not match to the OpenGL vertex model very directly. As you noticed, OpenGL uses a single set of indices. What you need to do is create an OpenGL vertex for each unique (vertex index, normal index) pair in your input. That takes a little … Read more