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/*******************************************************************************************
*
* rcamera - Basic camera system for multiple camera modes
*
* NOTE: Memory footprint of this library is aproximately 52 bytes (global variables)
*
* CONFIGURATION:
*
* #define CAMERA_IMPLEMENTATION
* Generates the implementation of the library into the included file.
* If not defined, the library is in header only mode and can be included in other headers
* or source files without problems. But only ONE file should hold the implementation.
*
* #define CAMERA_STANDALONE
* If defined, the library can be used as standalone as a camera system but some
* functions must be redefined to manage inputs accordingly.
*
* CONTRIBUTORS:
* Ramon Santamaria: Supervision, review, update and maintenance
* Marc Palau: Initial implementation (2014)
*
*
* LICENSE: zlib/libpng
*
* Copyright (c) 2015-2022 Ramon Santamaria (@raysan5)
*
* This software is provided "as-is", without any express or implied warranty. In no event
* will the authors be held liable for any damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose, including commercial
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not claim that you
* wrote the original software. If you use this software in a product, an acknowledgment
* in the product documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
* as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/
#ifndef RCAMERA_H
#define RCAMERA_H
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Types and Structures Definition
// NOTE: Below types are required for CAMERA_STANDALONE usage
//----------------------------------------------------------------------------------
#if defined(CAMERA_STANDALONE)
// Vector2 type
typedef struct Vector2 {
float x;
float y;
} Vector2;
// Vector3 type
typedef struct Vector3 {
float x;
float y;
float z;
} Vector3;
// Camera type, defines a camera position/orientation in 3d space
typedef struct Camera3D {
Vector3 position; // Camera position
Vector3 target; // Camera target it looks-at
Vector3 up; // Camera up vector (rotation over its axis)
float fovy; // Camera field-of-view apperture in Y (degrees) in perspective, used as near plane width in orthographic
int type; // Camera type, defines projection type: CAMERA_PERSPECTIVE or CAMERA_ORTHOGRAPHIC
} Camera3D;
typedef Camera3D Camera; // Camera type fallback, defaults to Camera3D
// Camera system modes
typedef enum {
CAMERA_CUSTOM = 0,
CAMERA_FREE,
CAMERA_ORBITAL,
CAMERA_FIRST_PERSON,
CAMERA_THIRD_PERSON
} CameraMode;
// Camera projection modes
typedef enum {
CAMERA_PERSPECTIVE = 0,
CAMERA_ORTHOGRAPHIC
} CameraProjection;
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
#ifdef __cplusplus
extern "C" { // Prevents name mangling of functions
#endif
#if defined(CAMERA_STANDALONE)
void SetCameraMode(Camera camera, int mode); // Set camera mode (multiple camera modes available)
void UpdateCamera(Camera *camera); // Update camera position for selected mode
void SetCameraPanControl(int keyPan); // Set camera pan key to combine with mouse movement (free camera)
void SetCameraAltControl(int keyAlt); // Set camera alt key to combine with mouse movement (free camera)
void SetCameraSmoothZoomControl(int szoomKey); // Set camera smooth zoom key to combine with mouse (free camera)
void SetCameraMoveControls(int keyFront, int keyBack,
int keyRight, int keyLeft,
int keyUp, int keyDown); // Set camera move controls (1st person and 3rd person cameras)
#endif
#ifdef __cplusplus
}
#endif
#endif // CAMERA_H
/***********************************************************************************
*
* CAMERA IMPLEMENTATION
*
************************************************************************************/
#if defined(CAMERA_IMPLEMENTATION)
#include <math.h> // Required for: sinf(), cosf(), sqrtf()
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#ifndef PI
#define PI 3.14159265358979323846
#endif
#ifndef DEG2RAD
#define DEG2RAD (PI/180.0f)
#endif
#ifndef RAD2DEG
#define RAD2DEG (180.0f/PI)
#endif
// Camera mouse movement sensitivity
#define CAMERA_MOUSE_MOVE_SENSITIVITY 0.003f
#define CAMERA_MOUSE_SCROLL_SENSITIVITY 1.5f
// FREE_CAMERA
#define CAMERA_FREE_MOUSE_SENSITIVITY 0.01f
#define CAMERA_FREE_DISTANCE_MIN_CLAMP 0.3f
#define CAMERA_FREE_DISTANCE_MAX_CLAMP 120.0f
#define CAMERA_FREE_MIN_CLAMP 85.0f
#define CAMERA_FREE_MAX_CLAMP -85.0f
#define CAMERA_FREE_SMOOTH_ZOOM_SENSITIVITY 0.05f
#define CAMERA_FREE_PANNING_DIVIDER 5.1f
// ORBITAL_CAMERA
#define CAMERA_ORBITAL_SPEED 0.01f // Radians per frame
// FIRST_PERSON
//#define CAMERA_FIRST_PERSON_MOUSE_SENSITIVITY 0.003f
#define CAMERA_FIRST_PERSON_FOCUS_DISTANCE 25.0f
#define CAMERA_FIRST_PERSON_MIN_CLAMP 89.0f
#define CAMERA_FIRST_PERSON_MAX_CLAMP -89.0f
#define CAMERA_FIRST_PERSON_STEP_TRIGONOMETRIC_DIVIDER 8.0f
#define CAMERA_FIRST_PERSON_STEP_DIVIDER 30.0f
#define CAMERA_FIRST_PERSON_WAVING_DIVIDER 200.0f
// THIRD_PERSON
//#define CAMERA_THIRD_PERSON_MOUSE_SENSITIVITY 0.003f
#define CAMERA_THIRD_PERSON_DISTANCE_CLAMP 1.2f
#define CAMERA_THIRD_PERSON_MIN_CLAMP 5.0f
#define CAMERA_THIRD_PERSON_MAX_CLAMP -85.0f
#define CAMERA_THIRD_PERSON_OFFSET (Vector3){ 0.4f, 0.0f, 0.0f }
// PLAYER (used by camera)
#define PLAYER_MOVEMENT_SENSITIVITY 20.0f
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// Camera move modes (first person and third person cameras)
typedef enum {
MOVE_FRONT = 0,
MOVE_BACK,
MOVE_RIGHT,
MOVE_LEFT,
MOVE_UP,
MOVE_DOWN
} CameraMove;
// Camera global state context data [56 bytes]
typedef struct {
unsigned int mode; // Current camera mode
float targetDistance; // Camera distance from position to target
float playerEyesPosition; // Player eyes position from ground (in meters)
Vector2 angle; // Camera angle in plane XZ
Vector2 previousMousePosition; // Previous mouse position
// Camera movement control keys
int moveControl[6]; // Move controls (CAMERA_FIRST_PERSON)
int smoothZoomControl; // Smooth zoom control key
int altControl; // Alternative control key
int panControl; // Pan view control key
} CameraData;
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
static CameraData CAMERA = { // Global CAMERA state context
.mode = 0,
.targetDistance = 0,
.playerEyesPosition = 1.85f,
.angle = { 0 },
.previousMousePosition = { 0 },
.moveControl = { 'W', 'S', 'D', 'A', 'E', 'Q' },
.smoothZoomControl = 341, // raylib: KEY_LEFT_CONTROL
.altControl = 342, // raylib: KEY_LEFT_ALT
.panControl = 2 // raylib: MOUSE_BUTTON_MIDDLE
};
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
#if defined(CAMERA_STANDALONE)
// NOTE: Camera controls depend on some raylib input functions
static void EnableCursor() {} // Unlock cursor
static void DisableCursor() {} // Lock cursor
static int IsKeyDown(int key) { return 0; }
static int IsMouseButtonDown(int button) { return 0;}
static float GetMouseWheelMove() { return 0.0f; }
static Vector2 GetMousePosition() { return (Vector2){ 0.0f, 0.0f }; }
#endif
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
// Select camera mode (multiple camera modes available)
void SetCameraMode(Camera camera, int mode)
{
Vector3 v1 = camera.position;
Vector3 v2 = camera.target;
float dx = v2.x - v1.x;
float dy = v2.y - v1.y;
float dz = v2.z - v1.z;
CAMERA.targetDistance = sqrtf(dx*dx + dy*dy + dz*dz); // Distance to target
// Camera angle calculation
CAMERA.angle.x = atan2f(dx, dz); // Camera angle in plane XZ (0 aligned with Z, move positive CCW)
CAMERA.angle.y = atan2f(dy, sqrtf(dx*dx + dz*dz)); // Camera angle in plane XY (0 aligned with X, move positive CW)
CAMERA.playerEyesPosition = camera.position.y; // Init player eyes position to camera Y position
CAMERA.previousMousePosition = GetMousePosition(); // Init mouse position
// Lock cursor for first person and third person cameras
if ((mode == CAMERA_FIRST_PERSON) || (mode == CAMERA_THIRD_PERSON)) DisableCursor();
else EnableCursor();
CAMERA.mode = mode;
}
// Update camera depending on selected mode
// NOTE: Camera controls depend on some raylib functions:
// System: EnableCursor(), DisableCursor()
// Mouse: IsMouseButtonDown(), GetMousePosition(), GetMouseWheelMove()
// Keys: IsKeyDown()
void UpdateCamera(Camera *camera)
{
static int swingCounter = 0; // Used for 1st person swinging movement
// TODO: Compute CAMERA.targetDistance and CAMERA.angle here (?)
// Mouse movement detection
Vector2 mousePositionDelta = { 0.0f, 0.0f };
Vector2 mousePosition = GetMousePosition();
float mouseWheelMove = GetMouseWheelMove();
// Keys input detection
// TODO: Input detection is raylib-dependant, it could be moved outside the module
bool keyPan = IsMouseButtonDown(CAMERA.panControl);
bool keyAlt = IsKeyDown(CAMERA.altControl);
bool szoomKey = IsKeyDown(CAMERA.smoothZoomControl);
bool direction[6] = { IsKeyDown(CAMERA.moveControl[MOVE_FRONT]),
IsKeyDown(CAMERA.moveControl[MOVE_BACK]),
IsKeyDown(CAMERA.moveControl[MOVE_RIGHT]),
IsKeyDown(CAMERA.moveControl[MOVE_LEFT]),
IsKeyDown(CAMERA.moveControl[MOVE_UP]),
IsKeyDown(CAMERA.moveControl[MOVE_DOWN]) };
if (CAMERA.mode != CAMERA_CUSTOM)
{
mousePositionDelta.x = mousePosition.x - CAMERA.previousMousePosition.x;
mousePositionDelta.y = mousePosition.y - CAMERA.previousMousePosition.y;
CAMERA.previousMousePosition = mousePosition;
}
// Support for multiple automatic camera modes
// NOTE: In case of CAMERA_CUSTOM nothing happens here, user must update it manually
switch (CAMERA.mode)
{
case CAMERA_FREE: // Camera free controls, using standard 3d-content-creation scheme
{
// Camera zoom
if ((CAMERA.targetDistance < CAMERA_FREE_DISTANCE_MAX_CLAMP) && (mouseWheelMove < 0))
{
CAMERA.targetDistance -= (mouseWheelMove*CAMERA_MOUSE_SCROLL_SENSITIVITY);
if (CAMERA.targetDistance > CAMERA_FREE_DISTANCE_MAX_CLAMP) CAMERA.targetDistance = CAMERA_FREE_DISTANCE_MAX_CLAMP;
}
// Camera looking down
else if ((camera->position.y > camera->target.y) && (CAMERA.targetDistance == CAMERA_FREE_DISTANCE_MAX_CLAMP) && (mouseWheelMove < 0))
{
camera->target.x += mouseWheelMove*(camera->target.x - camera->position.x)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.y += mouseWheelMove*(camera->target.y - camera->position.y)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.z += mouseWheelMove*(camera->target.z - camera->position.z)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
}
else if ((camera->position.y > camera->target.y) && (camera->target.y >= 0))
{
camera->target.x += mouseWheelMove*(camera->target.x - camera->position.x)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.y += mouseWheelMove*(camera->target.y - camera->position.y)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.z += mouseWheelMove*(camera->target.z - camera->position.z)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
// if (camera->target.y < 0) camera->target.y = -0.001;
}
else if ((camera->position.y > camera->target.y) && (camera->target.y < 0) && (mouseWheelMove > 0))
{
CAMERA.targetDistance -= (mouseWheelMove*CAMERA_MOUSE_SCROLL_SENSITIVITY);
if (CAMERA.targetDistance < CAMERA_FREE_DISTANCE_MIN_CLAMP) CAMERA.targetDistance = CAMERA_FREE_DISTANCE_MIN_CLAMP;
}
// Camera looking up
else if ((camera->position.y < camera->target.y) && (CAMERA.targetDistance == CAMERA_FREE_DISTANCE_MAX_CLAMP) && (mouseWheelMove < 0))
{
camera->target.x += mouseWheelMove*(camera->target.x - camera->position.x)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.y += mouseWheelMove*(camera->target.y - camera->position.y)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.z += mouseWheelMove*(camera->target.z - camera->position.z)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
}
else if ((camera->position.y < camera->target.y) && (camera->target.y <= 0))
{
camera->target.x += mouseWheelMove*(camera->target.x - camera->position.x)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.y += mouseWheelMove*(camera->target.y - camera->position.y)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
camera->target.z += mouseWheelMove*(camera->target.z - camera->position.z)*CAMERA_MOUSE_SCROLL_SENSITIVITY/CAMERA.targetDistance;
// if (camera->target.y > 0) camera->target.y = 0.001;
}
else if ((camera->position.y < camera->target.y) && (camera->target.y > 0) && (mouseWheelMove > 0))
{
CAMERA.targetDistance -= (mouseWheelMove*CAMERA_MOUSE_SCROLL_SENSITIVITY);
if (CAMERA.targetDistance < CAMERA_FREE_DISTANCE_MIN_CLAMP) CAMERA.targetDistance = CAMERA_FREE_DISTANCE_MIN_CLAMP;
}
// Input keys checks
if (keyPan)
{
if (keyAlt) // Alternative key behaviour
{
if (szoomKey)
{
// Camera smooth zoom
CAMERA.targetDistance += (mousePositionDelta.y*CAMERA_FREE_SMOOTH_ZOOM_SENSITIVITY);
}
else
{
// Camera rotation
CAMERA.angle.x += mousePositionDelta.x*-CAMERA_FREE_MOUSE_SENSITIVITY;
CAMERA.angle.y += mousePositionDelta.y*-CAMERA_FREE_MOUSE_SENSITIVITY;
// Angle clamp
if (CAMERA.angle.y > CAMERA_FREE_MIN_CLAMP*DEG2RAD) CAMERA.angle.y = CAMERA_FREE_MIN_CLAMP*DEG2RAD;
else if (CAMERA.angle.y < CAMERA_FREE_MAX_CLAMP*DEG2RAD) CAMERA.angle.y = CAMERA_FREE_MAX_CLAMP*DEG2RAD;
}
}
else
{
// Camera panning
camera->target.x += ((mousePositionDelta.x*CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(CAMERA.angle.x) + (mousePositionDelta.y*-CAMERA_FREE_MOUSE_SENSITIVITY)*sinf(CAMERA.angle.x)*sinf(CAMERA.angle.y))*(CAMERA.targetDistance/CAMERA_FREE_PANNING_DIVIDER);
camera->target.y += ((mousePositionDelta.y*CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(CAMERA.angle.y))*(CAMERA.targetDistance/CAMERA_FREE_PANNING_DIVIDER);
camera->target.z += ((mousePositionDelta.x*-CAMERA_FREE_MOUSE_SENSITIVITY)*sinf(CAMERA.angle.x) + (mousePositionDelta.y*-CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(CAMERA.angle.x)*sinf(CAMERA.angle.y))*(CAMERA.targetDistance/CAMERA_FREE_PANNING_DIVIDER);
}
}
// Update camera position with changes
camera->position.x = -sinf(CAMERA.angle.x)*CAMERA.targetDistance*cosf(CAMERA.angle.y) + camera->target.x;
camera->position.y = -sinf(CAMERA.angle.y)*CAMERA.targetDistance + camera->target.y;
camera->position.z = -cosf(CAMERA.angle.x)*CAMERA.targetDistance*cosf(CAMERA.angle.y) + camera->target.z;
} break;
case CAMERA_ORBITAL: // Camera just orbits around target, only zoom allowed
{
CAMERA.angle.x += CAMERA_ORBITAL_SPEED; // Camera orbit angle
CAMERA.targetDistance -= (mouseWheelMove*CAMERA_MOUSE_SCROLL_SENSITIVITY); // Camera zoom
// Camera distance clamp
if (CAMERA.targetDistance < CAMERA_THIRD_PERSON_DISTANCE_CLAMP) CAMERA.targetDistance = CAMERA_THIRD_PERSON_DISTANCE_CLAMP;
// Update camera position with changes
camera->position.x = sinf(CAMERA.angle.x)*CAMERA.targetDistance*cosf(CAMERA.angle.y) + camera->target.x;
camera->position.y = ((CAMERA.angle.y <= 0.0f)? 1 : -1)*sinf(CAMERA.angle.y)*CAMERA.targetDistance*sinf(CAMERA.angle.y) + camera->target.y;
camera->position.z = cosf(CAMERA.angle.x)*CAMERA.targetDistance*cosf(CAMERA.angle.y) + camera->target.z;
} break;
case CAMERA_FIRST_PERSON: // Camera moves as in a first-person game, controls are configurable
{
camera->position.x += (sinf(CAMERA.angle.x)*direction[MOVE_BACK] -
sinf(CAMERA.angle.x)*direction[MOVE_FRONT] -
cosf(CAMERA.angle.x)*direction[MOVE_LEFT] +
cosf(CAMERA.angle.x)*direction[MOVE_RIGHT])/PLAYER_MOVEMENT_SENSITIVITY;
camera->position.y += (sinf(CAMERA.angle.y)*direction[MOVE_FRONT] -
sinf(CAMERA.angle.y)*direction[MOVE_BACK] +
1.0f*direction[MOVE_UP] - 1.0f*direction[MOVE_DOWN])/PLAYER_MOVEMENT_SENSITIVITY;
camera->position.z += (cosf(CAMERA.angle.x)*direction[MOVE_BACK] -
cosf(CAMERA.angle.x)*direction[MOVE_FRONT] +
sinf(CAMERA.angle.x)*direction[MOVE_LEFT] -
sinf(CAMERA.angle.x)*direction[MOVE_RIGHT])/PLAYER_MOVEMENT_SENSITIVITY;
// Camera orientation calculation
CAMERA.angle.x += (mousePositionDelta.x*-CAMERA_MOUSE_MOVE_SENSITIVITY);
CAMERA.angle.y += (mousePositionDelta.y*-CAMERA_MOUSE_MOVE_SENSITIVITY);
// Angle clamp
if (CAMERA.angle.y > CAMERA_FIRST_PERSON_MIN_CLAMP*DEG2RAD) CAMERA.angle.y = CAMERA_FIRST_PERSON_MIN_CLAMP*DEG2RAD;
else if (CAMERA.angle.y < CAMERA_FIRST_PERSON_MAX_CLAMP*DEG2RAD) CAMERA.angle.y = CAMERA_FIRST_PERSON_MAX_CLAMP*DEG2RAD;
// Calculate translation matrix
Matrix matTranslation = { 1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, (CAMERA.targetDistance/CAMERA_FREE_PANNING_DIVIDER),
0.0f, 0.0f, 0.0f, 1.0f };
// Calculate rotation matrix
Matrix matRotation = { 1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f };
float cosz = cosf(0.0f);
float sinz = sinf(0.0f);
float cosy = cosf(-(PI*2 - CAMERA.angle.x));
float siny = sinf(-(PI*2 - CAMERA.angle.x));
float cosx = cosf(-(PI*2 - CAMERA.angle.y));
float sinx = sinf(-(PI*2 - CAMERA.angle.y));
matRotation.m0 = cosz*cosy;
matRotation.m4 = (cosz*siny*sinx) - (sinz*cosx);
matRotation.m8 = (cosz*siny*cosx) + (sinz*sinx);
matRotation.m1 = sinz*cosy;
matRotation.m5 = (sinz*siny*sinx) + (cosz*cosx);
matRotation.m9 = (sinz*siny*cosx) - (cosz*sinx);
matRotation.m2 = -siny;
matRotation.m6 = cosy*sinx;
matRotation.m10= cosy*cosx;
// Multiply translation and rotation matrices
Matrix matTransform = { 0 };
matTransform.m0 = matTranslation.m0*matRotation.m0 + matTranslation.m1*matRotation.m4 + matTranslation.m2*matRotation.m8 + matTranslation.m3*matRotation.m12;
matTransform.m1 = matTranslation.m0*matRotation.m1 + matTranslation.m1*matRotation.m5 + matTranslation.m2*matRotation.m9 + matTranslation.m3*matRotation.m13;
matTransform.m2 = matTranslation.m0*matRotation.m2 + matTranslation.m1*matRotation.m6 + matTranslation.m2*matRotation.m10 + matTranslation.m3*matRotation.m14;
matTransform.m3 = matTranslation.m0*matRotation.m3 + matTranslation.m1*matRotation.m7 + matTranslation.m2*matRotation.m11 + matTranslation.m3*matRotation.m15;
matTransform.m4 = matTranslation.m4*matRotation.m0 + matTranslation.m5*matRotation.m4 + matTranslation.m6*matRotation.m8 + matTranslation.m7*matRotation.m12;
matTransform.m5 = matTranslation.m4*matRotation.m1 + matTranslation.m5*matRotation.m5 + matTranslation.m6*matRotation.m9 + matTranslation.m7*matRotation.m13;
matTransform.m6 = matTranslation.m4*matRotation.m2 + matTranslation.m5*matRotation.m6 + matTranslation.m6*matRotation.m10 + matTranslation.m7*matRotation.m14;
matTransform.m7 = matTranslation.m4*matRotation.m3 + matTranslation.m5*matRotation.m7 + matTranslation.m6*matRotation.m11 + matTranslation.m7*matRotation.m15;
matTransform.m8 = matTranslation.m8*matRotation.m0 + matTranslation.m9*matRotation.m4 + matTranslation.m10*matRotation.m8 + matTranslation.m11*matRotation.m12;
matTransform.m9 = matTranslation.m8*matRotation.m1 + matTranslation.m9*matRotation.m5 + matTranslation.m10*matRotation.m9 + matTranslation.m11*matRotation.m13;
matTransform.m10 = matTranslation.m8*matRotation.m2 + matTranslation.m9*matRotation.m6 + matTranslation.m10*matRotation.m10 + matTranslation.m11*matRotation.m14;
matTransform.m11 = matTranslation.m8*matRotation.m3 + matTranslation.m9*matRotation.m7 + matTranslation.m10*matRotation.m11 + matTranslation.m11*matRotation.m15;
matTransform.m12 = matTranslation.m12*matRotation.m0 + matTranslation.m13*matRotation.m4 + matTranslation.m14*matRotation.m8 + matTranslation.m15*matRotation.m12;
matTransform.m13 = matTranslation.m12*matRotation.m1 + matTranslation.m13*matRotation.m5 + matTranslation.m14*matRotation.m9 + matTranslation.m15*matRotation.m13;
matTransform.m14 = matTranslation.m12*matRotation.m2 + matTranslation.m13*matRotation.m6 + matTranslation.m14*matRotation.m10 + matTranslation.m15*matRotation.m14;
matTransform.m15 = matTranslation.m12*matRotation.m3 + matTranslation.m13*matRotation.m7 + matTranslation.m14*matRotation.m11 + matTranslation.m15*matRotation.m15;
camera->target.x = camera->position.x - matTransform.m12;
camera->target.y = camera->position.y - matTransform.m13;
camera->target.z = camera->position.z - matTransform.m14;
// If movement detected (some key pressed), increase swinging
for (int i = 0; i < 6; i++) if (direction[i]) { swingCounter++; break; }
// Camera position update
// NOTE: On CAMERA_FIRST_PERSON player Y-movement is limited to player 'eyes position'
camera->position.y = CAMERA.playerEyesPosition - sinf(swingCounter/CAMERA_FIRST_PERSON_STEP_TRIGONOMETRIC_DIVIDER)/CAMERA_FIRST_PERSON_STEP_DIVIDER;
camera->up.x = sinf(swingCounter/(CAMERA_FIRST_PERSON_STEP_TRIGONOMETRIC_DIVIDER*2))/CAMERA_FIRST_PERSON_WAVING_DIVIDER;
camera->up.z = -sinf(swingCounter/(CAMERA_FIRST_PERSON_STEP_TRIGONOMETRIC_DIVIDER*2))/CAMERA_FIRST_PERSON_WAVING_DIVIDER;
} break;
case CAMERA_THIRD_PERSON: // Camera moves as in a third-person game, following target at a distance, controls are configurable
{
camera->position.x += (sinf(CAMERA.angle.x)*direction[MOVE_BACK] -
sinf(CAMERA.angle.x)*direction[MOVE_FRONT] -
cosf(CAMERA.angle.x)*direction[MOVE_LEFT] +
cosf(CAMERA.angle.x)*direction[MOVE_RIGHT])/PLAYER_MOVEMENT_SENSITIVITY;
camera->position.y += (sinf(CAMERA.angle.y)*direction[MOVE_FRONT] -
sinf(CAMERA.angle.y)*direction[MOVE_BACK] +
1.0f*direction[MOVE_UP] - 1.0f*direction[MOVE_DOWN])/PLAYER_MOVEMENT_SENSITIVITY;
camera->position.z += (cosf(CAMERA.angle.x)*direction[MOVE_BACK] -
cosf(CAMERA.angle.x)*direction[MOVE_FRONT] +
sinf(CAMERA.angle.x)*direction[MOVE_LEFT] -
sinf(CAMERA.angle.x)*direction[MOVE_RIGHT])/PLAYER_MOVEMENT_SENSITIVITY;
// Camera orientation calculation
CAMERA.angle.x += (mousePositionDelta.x*-CAMERA_MOUSE_MOVE_SENSITIVITY);
CAMERA.angle.y += (mousePositionDelta.y*-CAMERA_MOUSE_MOVE_SENSITIVITY);
// Angle clamp
if (CAMERA.angle.y > CAMERA_THIRD_PERSON_MIN_CLAMP*DEG2RAD) CAMERA.angle.y = CAMERA_THIRD_PERSON_MIN_CLAMP*DEG2RAD;
else if (CAMERA.angle.y < CAMERA_THIRD_PERSON_MAX_CLAMP*DEG2RAD) CAMERA.angle.y = CAMERA_THIRD_PERSON_MAX_CLAMP*DEG2RAD;
// Camera zoom
CAMERA.targetDistance -= (mouseWheelMove*CAMERA_MOUSE_SCROLL_SENSITIVITY);
// Camera distance clamp
if (CAMERA.targetDistance < CAMERA_THIRD_PERSON_DISTANCE_CLAMP) CAMERA.targetDistance = CAMERA_THIRD_PERSON_DISTANCE_CLAMP;
camera->position.x = sinf(CAMERA.angle.x)*CAMERA.targetDistance*cosf(CAMERA.angle.y) + camera->target.x;
if (CAMERA.angle.y <= 0.0f) camera->position.y = sinf(CAMERA.angle.y)*CAMERA.targetDistance*sinf(CAMERA.angle.y) + camera->target.y;
else camera->position.y = -sinf(CAMERA.angle.y)*CAMERA.targetDistance*sinf(CAMERA.angle.y) + camera->target.y;
camera->position.z = cosf(CAMERA.angle.x)*CAMERA.targetDistance*cosf(CAMERA.angle.y) + camera->target.z;
} break;
case CAMERA_CUSTOM: break;
default: break;
}
}
// Set camera pan key to combine with mouse movement (free camera)
void SetCameraPanControl(int keyPan) { CAMERA.panControl = keyPan; }
// Set camera alt key to combine with mouse movement (free camera)
void SetCameraAltControl(int keyAlt) { CAMERA.altControl = keyAlt; }
// Set camera smooth zoom key to combine with mouse (free camera)
void SetCameraSmoothZoomControl(int szoomKey) { CAMERA.smoothZoomControl = szoomKey; }
// Set camera move controls (1st person and 3rd person cameras)
void SetCameraMoveControls(int keyFront, int keyBack, int keyRight, int keyLeft, int keyUp, int keyDown)
{
CAMERA.moveControl[MOVE_FRONT] = keyFront;
CAMERA.moveControl[MOVE_BACK] = keyBack;
CAMERA.moveControl[MOVE_RIGHT] = keyRight;
CAMERA.moveControl[MOVE_LEFT] = keyLeft;
CAMERA.moveControl[MOVE_UP] = keyUp;
CAMERA.moveControl[MOVE_DOWN] = keyDown;
}
#endif // CAMERA_IMPLEMENTATION

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