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-rw-r--r--include/camera.h132
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diff --git a/include/camera.h b/include/camera.h
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-#ifndef HONEY_CAMERA_H
-#define HONEY_CAMERA_H
-
-/** @file camera.h
- *
- * @brief Define the basic honey_camera struct, associated functions,
- * and common camera variants.
- */
-
-#include "common.h"
-
-enum honey_camera_projection {
- HONEY_PERSPECTIVE,
- HONEY_ORTHOGRAPHIC,
-};
-
-typedef struct {
- vec3 position;
- vec3 angle; /* pitch, yaw, roll */
- vec3 look_direction;
- vec3 up;
- vec3 right;
- mat4 view;
- mat4 projection;
- enum honey_camera_projection projection_type;
- float aspect_ratio;
- float near, far;
- float fov;
- float ortho_left;
- float ortho_right;
- float ortho_top;
- float ortho_bottom;
-} honey_camera;
-
-/** @brief Create a new camera.
- *
- * The full camera creation function. Most of the time, you will probably use either
- * honey_camera_new_perspective() or honey_camera_new_projection() instead.
- *
- * @param[out] camera Pointer to the destination honey_camera.
- * @param[in] position The position of the camera.
- * @param[in] angle The Euler angles (pitch, yaw, roll) of the camera.
- * @param[in] projection_type The type of projection to use.
- * @param[in] aspect_ratio The aspect ratio of the camera. Set to zero if using orthographic projection.
- * @param[in] near The distance of the near plane.
- * @param[in] far The distance of the far plane.
- * @param[in] fov The field of view. Set to zero if using orthographic projection.
- * @param[in] left The leftmost distance. Set to zero if using perspective projection.
- * @param[in] right The rightmost distance. Set to zero if using perspective projection.
- * @param[in] top The uppermost distance. Set to zero if using perspective projection.
- * @param[in] bottom The lowest distance. Set to zero if using perspective projection.
- */
-void honey_camera_new(honey_camera* camera,
- vec3 position,
- vec3 angle,
- enum honey_camera_projection projection_type,
- float aspect_ratio,
- float near, float far,
- float fov,
- float left, float right, float top, float bottom);
-
-/** @brief Create a camera with a perspective projection matrix.
- *
- * @param[out] camera Pointer to the destination honey_camera.
- * @param[in] position The position of the camera.
- * @param[in] angle The Euler angles (pitch, yaw, roll) of the camera.
- * @param[in] aspect_ratio The aspect ratio of the camera.
- * @param[in] near The distance of the near plane.
- * @param[in] far The distance of the far plane.
- * @param[in] fov The field of view.
- */
-void honey_camera_new_perspective(honey_camera* camera,
- vec3 position,
- vec3 angle,
- float aspect_ratio,
- float near, float far,
- float fov);
-
-/** @brief Create a camera with an orthographic projection matrix.
- *
- * @param[out] camera Pointer to the destination honey_camera.
- * @param[in] position The position of the camera.
- * @param[in] angle The Euler angles (pitch, yaw, roll) of the camera.
- * @param[in] near The distance of the near plane.
- * @param[in] far The distance of the far plane.
- * @param[in] left The leftmost distance.
- * @param[in] right The rightmost distance.
- * @param[in] top The uppermost distance.
- * @param[in] bottom The lowest distance.
- */
-void honey_camera_new_orthographic(honey_camera* camera,
- vec3 position,
- vec3 angle,
- float near, float far,
- float left, float right, float top, float bottom);
-
-/** @brief (Re-)Calculate a camera's look_direction.
- *
- * @param[in] Pointer to the camera to re-calculate.
- */
-void honey_camera_calculate_look_direction(honey_camera* camera);
-
-/** @brief (Re-)Calculate a camera's up vector.
- *
- * @param[in] Pointer to the camera to re-calculate.
- */
-void honey_camera_calculate_up(honey_camera* camera);
-
-/** @brief (Re-)Calculate a camera's right vector.
- *
- * @param[in] Pointer to the camera to re-calculate.
- */
-void honey_camera_calculate_right(honey_camera* camera);
-
-/** @brief (Re-)Calculate a camera's view matrix.
- *
- * This function need only be called when the camera has been moved in some way.
- *
- * @param[in] camera Pointer to the camera to re-calculate.
- */
-void honey_camera_calculate_view(honey_camera* camera);
-
-/** @brief (Re-)Calculate a camera's projection matrix.
- *
- * This function need only be called when the projection has changes in some way.
- * Most commonly, this would be changing the FOV.
- *
- * @param[in] camera Pointer to the camera to re-calculate.
- */
-void honey_camera_calculate_projection(honey_camera* camera);
-
-#endif