Textures have sharper edges

Description

The texture we provided only has 4 pixels (2x2). The rendered cubes will likely have more than 4 pixels per face, so OpenGL will interpolate between values to create a color gradient.

This isn't what we want for our game aesthetic, so we can instruct OpenGL to not interpolate but choose the nearest color to the point. This will result in a sharper, blockier texture which is what we're looking for.

Screenshot

Commands

git clone git@github.com:atsheehan/iridium
cd iridium
git checkout c37ccecca1bbf8c2b8c073f2ffc79cfee6fafe56
cargo run --release

Code Changes

`Modified src/render.rsGitHub`

@@ -111,6 +111,13 @@
111111                  gl::UNSIGNED_BYTE,
112112                  data.as_ptr() as *const c_void,
113113              );
114+             gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::NEAREST as GLint);
115+             gl::TexParameteri(
116+                 gl::TEXTURE_2D,
117+                 gl::TEXTURE_MIN_FILTER,
118+                 gl::NEAREST_MIPMAP_NEAREST as GLint,
119+             );
120+ 
114121              gl::GenerateMipmap(gl::TEXTURE_2D);
115122              cube_texture_id
116123          };

@@ -111,6 +111,13 @@
111                  gl::UNSIGNED_BYTE,
112                  data.as_ptr() as *const c_void,
113              );
 
 
 
 
 
 
 
114              gl::GenerateMipmap(gl::TEXTURE_2D);
115              cube_texture_id
116          };

@@ -111,6 +111,13 @@
111                  gl::UNSIGNED_BYTE,
112                  data.as_ptr() as *const c_void,
113              );
114+             gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::NEAREST as GLint);
115+             gl::TexParameteri(
116+                 gl::TEXTURE_2D,
117+                 gl::TEXTURE_MIN_FILTER,
118+                 gl::NEAREST_MIPMAP_NEAREST as GLint,
119+             );
120+ 
121              gl::GenerateMipmap(gl::TEXTURE_2D);
122              cube_texture_id
123          };