super basic UI constraint and alignment system with a super basic "game framework"

shaders/font.frag

@@ -3,9 +3,9 @@ in vec2 TexCoords;
 out vec4 FragColor;
 
 uniform sampler2D text;
-uniform vec3 textColor;
+uniform vec4 textColor;
 
 void main() {
   vec4 sampled = vec4(1.0, 1.0, 1.0, texture(text, TexCoords).r);
-  FragColor = vec4(textColor, 1.0) * sampled;
+  FragColor = textColor * sampled;
 }

shaders/font.vert

@@ -2,9 +2,10 @@
 layout (location = 0) in vec4 vertex;
 
 out vec2 TexCoords;
-uniform mat4 transform;
+uniform mat4 projection;
+uniform mat4 model;
 
 void main() {
-  gl_Position = transform * vec4(vertex.xy, 0.0, 1.0);
+  gl_Position = projection * model * vec4(vertex.xy, 0.0, 1.0);
   TexCoords = vertex.zw;
 }

shaders/ui.frag

@@ -0,0 +1,9 @@
+#version 330 core
+
+in vec2 texCoords;
+out vec4 FragColor;
+uniform vec4 aColor;
+
+void main() {
+  FragColor = vec4(aColor);
+}

shaders/ui.vert

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec2 aTexCoords;
+out vec2 texCoords;
+
+uniform mat4 projection;
+
+void main() {
+  gl_Position = projection * vec4(aPos, 1.0f);
+  texCoords = aTexCoords;
+}