Projection equation and first cube

include/camera/camera.h

@@ -0,0 +1,15 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include "vector/vec.h"
+#include "window/window.h"
+
+typedef struct {
+  vec3f_t position;
+  vec3f_t rotation;
+} camera_t;
+
+vec2i_t project_point(vec3f_t point, const window_t *wnd,
+                      const camera_t *camera, vec3f_t viewport);
+
+#endif // !CAMERA_H