Add base camera

src/camera.cpp

@@ -0,0 +1,17 @@
+#include "camera.h"
+
+Matrix4 get_camera_view_matrix(Camera *camera, Render_Data *render_data) {
+  f32 azimimuth_radians = glm::radians(render_data.view_azimuth);
+  f32 elevation_radians = glm::radians(render_data.view_elevation);
+
+  f32 sin_azimuth = glm::sin(azimuth_radians);
+  f32 cos_azimuth = glm::cos(azimuth_radians);
+  f32 sin_elevation = glm::sin(elevation_radians);
+  f32 cos_elevation = glm::cos(elevation_radians);
+
+  camera->view_direction = glm::normalize(Vector3(sin_azimuth * cos_elevation, sin_elevation, -cos_azimuth * cos_elevation));
+
+  Matrix4 look_at = glm::lookAt(camera->world_position, camera->world_position + camera->view_direction, camera->word_up_vector);
+
+  return look_at;
+}

src/camera.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "basic.h"
+#include <glm/glm.hpp>
+#include "renderer.h"
+#include "render_data.h"
+
+struct Camera {
+  Vector3 world_position = Vector3(0.5f, 0.25f, 1.0f);
+  Vector3 view_direction = Vector3(0.0f, 0.0f, 0.0f);
+  Vector3 world_up_vector = Vector3(0.0f, 1.0f, 0.0f);
+};
+
+Matrix4 get_camera_view_matrix(Camera *camera, Render_Data *render_data);
+

src/render_data.h

@@ -24,4 +24,7 @@ struct Render_Data {
   f32 user_interface_generate_time = 0.0f;
   bool use_alt_shader = false;
   s32 field_of_view = 90;
+
+  f32 view_azimuth = 320.0f;
+  f32 view_elevation = -15.0f;
 };

src/renderer.h

@@ -7,6 +7,7 @@
 #include <glm/gtc/type_ptr.hpp>
 #include "render_data.h"
 #include "user_interface.h"
+#include "camera.h"
 #include "timer.h"