Is the interpolation formula for UV texture mapping correct?
Then I turn the u v indexes into one index in order to fetch the correct pixel from the image data (which is a 1 dimensional px array): The interpolation formula is correct considering the consistency of the texture (including the straight stripes).
How to display textures in the UV image editor?
To display the textures used in the material of the object regardless of the texture (or lack of texture) displayed in the UV image editor, enable GLSL in 3D view > Properties region ( N) > Shading and set the viewport shading to Texture: You need a material to display textures in the viewport in cycles.
How to interpolate UV coordinates in JavaScript?
The general formula I use for interpolating the uv coordinates is pretty much the one I use for the z-buffering interpolation and looks like this (in this case for horizontal scanlines): Then I turn the u v indexes into one index in order to fetch the correct pixel from the image data (which is a 1 dimensional px array):
How does texture work in the 3D view editor?
Texture displays the texture of the last selected image texture node: Material tries to approximate the result of the shader nodes, so if you have two combined textures: The object with the texture needs to have its Maximum Draw Type set to Textured.
How to calculate the UV coordinates of a cube?
Because the UV coordinates go all the way up to 0.5, you include a single-pixel edge of the “2” and “3” areas when you draw the “1” face of the cube. For instance, when the u coordinate is 0.5, you will multiply that by 100 and get 50, which is the first pixel of the “2” area.
Where do you get Texels from in a texture?
This means that you can only get texels from inside that part of your texture, regardless of which side of the cube you draw. Because the UV coordinates go all the way up to 0.5, you include a single-pixel edge of the “2” and “3” areas when you draw the “1” face of the cube.
How do I calculate UV space from World space in?
I am drawing a mesh on the screen in world space coordinates which needs to lookup into a screen space texture: The way I am currently solving this is by calculating the uvs for each vertex of the mesh using the following calculation: Unity uses normalised coordinates for the viewport [0,1] rather than [-1,1].