retructurized examples

examples/example_proj_mat_builder/example_proj_mat_builder.cpp

@@ -0,0 +1,40 @@
+//
+// Created by Vlad on 3/19/2025.
+//
+
+
+#include <iostream>
+#include <print>
+#include <omath/engines/opengl_engine/formulas.hpp>
+
+
+int main()
+{
+    std::println("OMATH Projection Matrix Builder");
+
+    float fov = 0;
+    float near = 0;
+    float far = 0;
+    float view_port_width = 0;
+    float view_port_height = 0;
+
+    std::print("Enter camera fov: ");
+    std::cin >> fov;
+
+    std::print("Enter camera z near: ");
+    std::cin >> near;
+
+    std::print("Enter camera z far: ");
+    std::cin >> far;
+
+    std::print("Enter camera screen width: ");
+    std::cin >> view_port_width;
+
+    std::print("Enter camera screen height: ");
+    std::cin >> view_port_height;
+
+    const auto mat =
+            omath::opengl_engine::calc_perspective_projection_matrix(fov, view_port_width / view_port_height, near, far);
+
+    std::print("{}", mat.to_string());
+};