src/game/player.c

   1 #include "player.h"
   2
   3 #include "engine/asset.h"
   4 #include "engine/render.h"
   5
   6 static const float movementSpeed = 2.5f;
   7
   8 Scene* playerCharacter;
   9 static Transform screenToWorldMovementTransform;
  10 static Vector worldMovementUp;
  11 static Vector worldMovementDown;
  12 static Vector worldMovementLeft;
  13 static Vector worldMovementRight;
  14 static Direction movementDirection;
  15
  16 static void movePlayer(Vector direction, float delta);
  17 static Vector worldMovementDirection(float x, float y);
  18
  19
  20
  21 void initPlayer() {
  22         screenToWorldMovementTransform = identity();
  23         rotate(&screenToWorldMovementTransform, (Vector) { 0.0f, 1.0f, 0.0f }, - TAU / 8.0f);
  24
  25         worldMovementUp = worldMovementDirection(0.0f, 1.0f);
  26         worldMovementDown = worldMovementDirection(0.0f, -1.0f);
  27         worldMovementLeft = worldMovementDirection(-1.0f, 0.0f);
  28         worldMovementRight = worldMovementDirection(1.0f, 0.0f);
  29
  30         playerCharacter = newScene();
  31         cameraAnchor = playerCharacter;
  32         playerCharacter->solid = importSolid("assets/playercharacter.3ds");
  33 }
  34
  35 void spawnPlayer(Transform transform) {
  36         playerCharacter->transform = transform;
  37         reparentScene(playerCharacter, currentScene);
  38 }
  39
  40 void updatePlayer(float delta) {
  41         Vector direction = { 0.0f, 0.0f, 0.0f };
  42         if (movementDirection & DIRECTION_UP) {
  43                 direction = addVectors(direction, worldMovementUp);
  44         }
  45         if (movementDirection & DIRECTION_DOWN) {
  46                 direction = addVectors(direction, worldMovementDown);
  47         }
  48         if (movementDirection & DIRECTION_LEFT) {
  49                 direction = addVectors(direction, worldMovementLeft);
  50         }
  51         if (movementDirection & DIRECTION_RIGHT) {
  52                 direction = addVectors(direction, worldMovementRight);
  53         }
  54         movePlayer(direction, delta);
  55 }
  56
  57 void startMovement(Direction direction) {
  58         movementDirection |= direction;
  59 }
  60
  61 void stopMovement(Direction direction) {
  62         movementDirection &= ~direction;
  63 }
  64
  65 static void movePlayer(Vector direction, float delta) {
  66         direction = clampMagnitude(direction, 1.0f);
  67         Vector displacement = scaleVector(direction, delta * movementSpeed);
  68         translate(&playerCharacter->transform, displacement);
  69 }
  70
  71 static Vector worldMovementDirection(float x, float y) {
  72         Vector direction = (Vector) { x, 0.0f, -y };
  73         direction = normalized(
  74                 applyTransform(screenToWorldMovementTransform, direction));
  75         return direction;
  76 }