Texturize a shape of multiple triangles in 2D

Posted by Deukalion on Game Development See other posts from Game Development or by Deukalion
Published on 2012-11-23T14:55:02Z Indexed on 2012/11/23 17:20 UTC
Read the original article Hit count: 279

Filed under:

XNA

|

textures

|

triangles

|

normal-mapping

|

shape

This is an example of a shape consisting of multiple points, triangles and eventually a shape: enter image description here

Red Dots = Vector3 (X, Y, Z) or Vector2 (X, Y)

If I have a Texture of a certain size, how do I texturize this area in the best way so that the texture inside the shape matches the shape and does not overlap anywhere? Perhaps also with a chance to scale the texture in case it's too small or to big for the shape, but still so that it gets rendered correctly.

Do I treat the shape as a rectangle? Figure out it's 4 corners? Or do I calculate the distance between Center - (Texture Width / 2) and Point (to see how "many" times the texture can fit between on that axis to estimate at what Coordinates the Texture should be at that certain point?

I've looked at Texture Mapping but haven't found any concrete examples that it explains it well, it's also confusing with 0.0-1.0 values for Texture Coordinates.

© Game Development or respective owner

Related posts about XNA

Camera for 2.5D Game

as seen on Game Development - Search for 'Game Development'
I'm hoping someone can explain this to me like I'm 5, because I've been struggling with this for hours and simply cannot understand what I'm doing wrong. I've written a Camera class for my 2.5D game. The intention is to support world and screen spaces like this: The camera is the black thing on… >>> More
Using XNA ContentPipeline to export a file in a machine without full XNA GS

as seen on Game Development - Search for 'Game Development'
My game uses the Content Pipeline to load the spriteSheet at runtime. The artist for the game sends me the modified spritesheet and I do a build in my machine and send him an updated project. So I'm looking for a way to generate the xnb files in his machine (this is the output of the content pipeline)… >>> More
XNA - Strange Texture Rendering Issue Using XNA BasicEffect

as seen on Game Development - Search for 'Game Development'
I have been reading and working through Riemers 3D XNA tutorials to expand my knowledge of XNA from 2D into 3D. Unfortunately I am having rendering issues that I am unable to solve and I need a point in the right direction. I am not expecting the Models to look identical to Blender but there is… >>> More
XNA Notes 009

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
This past week the MVPs (myself included) were on Microsoft campus for the MVP summit. So I apologize in advance if you did something cool or heard of something cool happening with XNA and XBLIGs and it’s not in my notes. I did my best to stay on top of things, but honestly this community is fast… >>> More
XNA Notes 006

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
If you used to think the XNA community was small and inactive, hopefully these XNA Notes are opening your eyes. And I honestly feel like I’m still only catching the tail end of everything that’s going on. It’s a large and active community and you can be so mired down in one part of it you miss all… >>> More

Related posts about textures

Textures on top of other textures when using VBOs

as seen on Game Development - Search for 'Game Development'
I'm currently making a cube style game. With chunks being drawn with VBOs. I'd like to know if there is a way to create an overlay texture on top of the existing texture without the need to rebuild the VBO. This is required to show activity in a cube (think of Minecraft when destroying a block and… >>> More
Texture switching with a entity system

as seen on Game Development - Search for 'Game Development'
I'm using thinking of using an entity system in my game. So far I've been using Artemis with success. However, I have a question about texture switching. I read that switching textures too often is bad. So I load all the textures when the game loads like so: import org.newdawn.slick.opengl.TextureLoader; … >>> More
SFML: Generate a background image

as seen on Game Development - Search for 'Game Development'
I want to generate a background, which is used in the game, on every instance of the game based on certain conditions. To do so, I'm using a sf::RenderTexture and a sf::Texture like this: sf::RenderTexture image; std::vector<sf::Texture> textures; sf::Texture texture; // instantiating the vector… >>> More
Unity: how to apply programmatical changes to the Terrain SplatPrototype?

as seen on Game Development - Search for 'Game Development'
I have a script to which I add a Terrain object (I drag and drop the terrain in the public Terrain field). The Terrain is already setup in Unity to have 2 PaintTextures: 1 is a Square (set up with a tile size so that it forms a checkered pattern) and the 2nd one is a grass image: Also the Target… >>> More
SDL2 sprite batching and texture atlases

as seen on Game Development - Search for 'Game Development'
I have been programming a 2D game in C++, using the SDL2 graphics API for rendering. My game concept currently features effects that could result in even tens of thousands of sprites being drawn simultaneously to the screen. I'd like to know what can be done for increasing rendering efficiency if… >>> More