Navy.gif/imgui
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Expand on texture coordinates exmaples

omar 2022-02-07 11:58:07 +01:00
parent cb5b8b24da
commit 7911b36b75
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
Image-Loading-and-Displaying-Examples.md

@ -553,6 +553,25 @@ ImGui::Text("uv1 = (%f, %f)", uv1.x, uv1.y);
ImGui::Image((void*)(intptr_t)my_image_texture, ImVec2(100.0f, 200.0f), uv0, uv1); ImGui::Image((void*)(intptr_t)my_image_texture, ImVec2(100.0f, 200.0f), uv0, uv1);
``` ```
Same code written differently:
```cpp
ImVec2 display_min = ImVec2(10.0f, 10.0f);
ImVec2 display_size = ImVec2(100.0f, 200.0f);
// Normalized coordinates of pixel (10,10) in a 256x256 texture.
ImVec2 uv0 = ImVec2(display_min.x / 256.0f, display_min.y / 256.0f);
// Normalized coordinates of pixel (110,210) in a 256x256 texture.
ImVec2 uv1 = ImVec2((display_min.x + display_size.x) / 256.0f, (display_min.y + display_size.y) / 256.0f);
ImGui::Text("uv0 = (%f, %f)", uv0.x, uv0.y);
ImGui::Text("uv1 = (%f, %f)", uv1.x, uv1.y);
// Display the 100x200 section starting at (10,10)
ImGui::Image((void*)(intptr_t)my_image_texture, ImVec2(display_size.x, display_size.y), uv0, uv1);
```
![Using UV](https://user-images.githubusercontent.com/8225057/79073825-f9988280-7ce8-11ea-8596-1fd495720ffa.png) ![Using UV](https://user-images.githubusercontent.com/8225057/79073825-f9988280-7ce8-11ea-8596-1fd495720ffa.png)
You can look up "texture coordinates" from other resources such as your favorite search engine, or graphics tutorials. You can look up "texture coordinates" from other resources such as your favorite search engine, or graphics tutorials.