Entity

src/CMakeLists.txt

@@ -35,7 +35,6 @@ add_subdirectory(engine)
 add_subdirectory(error)
 add_subdirectory(input)
 # add_subdirectory(locale)
-add_subdirectory(physics)
 add_subdirectory(rpg)
 add_subdirectory(scene)
 add_subdirectory(thread)

src/rpg/entity/CMakeLists.txt

@@ -7,7 +7,8 @@
 target_sources(${DUSK_TARGET_NAME}
   PRIVATE
     entity.c
+    entityanim.c
     npc.c
     player.c
-    direction.c
+    entitydir.c
 )

src/rpg/entity/direction.c

@@ -1,48 +0,0 @@
-/**
- * Copyright (c) 2025 Dominic Masters
- * 
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#include "direction.h"
-#include "assert/assert.h"
-
-float_t directionToAngle(const direction_t dir) {
-  switch(dir) {
-    case DIRECTION_NORTH: return (M_PI_2);
-    case DIRECTION_SOUTH: return -(M_PI_2);
-    case DIRECTION_EAST: return 0;
-    case DIRECTION_WEST: return (M_PI);
-    default: return 0; // Should never happen
-  }
-}
-
-void directionGetVec2(const direction_t dir, vec2 out) {
-  assertNotNull(out, "Output vector cannot be NULL");
-
-  switch(dir) {
-    case DIRECTION_NORTH:
-      out[0] = 0.0f;
-      out[1] = 1.0f;
-      break;
-
-    case DIRECTION_SOUTH:
-      out[0] = 0.0f;
-      out[1] = -1.0f;
-      break;
-
-    case DIRECTION_EAST:
-      out[0] = 1.0f;
-      out[1] = 0.0f;
-      break;
-
-    case DIRECTION_WEST:
-      out[0] = -1.0f;
-      out[1] = 0.0f;
-      break;
-
-    default:
-      assertUnreachable("Invalid direction");
-  }
-}

src/rpg/entity/direction.h

@@ -1,37 +0,0 @@
-/**
- * Copyright (c) 2025 Dominic Masters
- * 
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#pragma once
-#include "dusk.h"
-
-typedef enum {
-  DIRECTION_SOUTH = 0,
-  DIRECTION_EAST = 1,
-  DIRECTION_WEST = 2,
-  DIRECTION_NORTH = 3,
-
-  DIRECTION_UP = DIRECTION_NORTH,
-  DIRECTION_DOWN = DIRECTION_SOUTH,
-  DIRECTION_LEFT = DIRECTION_WEST,
-  DIRECTION_RIGHT = DIRECTION_EAST,
-} direction_t;
-
-/**
- * Converts a direction to an angle in float_t format.
- * 
- * @param dir The direction to convert.
- * @return The angle corresponding to the direction.
- */
-float_t directionToAngle(const direction_t dir);
-
-/**
- * Converts a direction to a vec2 unit vector.
- * 
- * @param dir The direction to convert.
- * @param out Pointer to the vec2 array to populate.
- */
-void directionGetVec2(const direction_t dir, vec2 out);

src/rpg/entity/entity.c

@@ -46,8 +46,66 @@ void entityUpdate(entity_t *entity) {
   assertTrue(entity->type < ENTITY_TYPE_COUNT, "Invalid entity type");
   assertTrue(entity->type != ENTITY_TYPE_NULL, "Cannot have NULL entity type");
 
+  // What state is the entity in?
+  if(entity->animation != ENTITY_ANIM_IDLE) {
+    // Entity is mid animation, tick it (down).
+    entity->animFrame--;
+    if(entity->animFrame == 0) entity->animation = ENTITY_ANIM_IDLE;
+    return;
+  }
+
   // Movement code.
   if(entity->type == ENTITY_TYPE_PLAYER) {
     playerMovement(entity);
   }
 }
+
+void entityTurn(entity_t *entity, const entitydir_t direction) {
+  entity->direction = direction;
+  entity->animation = ENTITY_ANIM_TURN;
+  entity->animFrame = ENTITY_ANIM_TURN_DURATION;
+}
+
+
+void entityWalk(entity_t *entity, const entitydir_t direction) {
+  // TODO: Animation, delay, etc.
+  entity->direction = direction;
+
+  // Where are we moving?
+  uint8_t newX, newY;
+  newX = entity->position.x;
+  newY = entity->position.y;
+  {
+    int8_t relX, relY;
+    entityDirGetRelative(direction, &relX, &relY);
+    newX += relX;
+    newY += relY;
+  }
+
+  // TODO: Tile in way?
+  // TODO: Map bounds in way?
+
+  // Entity in way?
+  // entity_t *start = GAME.overworld.map.entities;
+  // entity_t *end = start + MAP_ENTITY_COUNT;
+  // while(start < end) {
+  //   if(
+  //     start == entity ||
+  //     entity->type == ENTITY_TYPE_NULL ||
+  //     start->position.x != newX ||
+  //     start->position.y != newY
+  //   ) {
+  //     start++;
+  //     continue;
+  //   }
+
+  //   return;// Blocked
+  // }
+
+  // Move.
+  entity->position.x = newX;
+  entity->position.y = newY;
+
+  entity->animation = ENTITY_ANIM_WALK;
+  entity->animFrame = ENTITY_ANIM_WALK_DURATION;// TODO: Running vs walking
+}

src/rpg/entity/entity.h

@@ -6,9 +6,11 @@
  */
 
 #pragma once
-#include "direction.h"
+#include "entitydir.h"
+#include "entityanim.h"
 #include "rpg/entity/player.h"
 #include "npc.h"
+#include "rpg/world/worldpos.h"
 
 #define ENTITY_COUNT 256
 
@@ -18,15 +20,19 @@ typedef enum {
   ENTITY_TYPE_NULL,
   ENTITY_TYPE_PLAYER,
   ENTITY_TYPE_NPC,
-
   ENTITY_TYPE_COUNT
 } entitytype_t;
 
 typedef struct entity_s {
   uint8_t id;
   entitytype_t type;
-  direction_t direction;
-  uint32_t position;// Tile index
+
+  // Movement
+  entitydir_t direction;
+  worldpos_t position;
+
+  entityanim_t animation;
+  uint8_t animFrame;
   
   union {
     player_t player;
@@ -50,3 +56,19 @@ void entityInit(entity_t *entity, const entitytype_t type);
  * @param entity Pointer to the entity structure to update.
  */
 void entityUpdate(entity_t *entity);
+
+/**
+ * Turn an entity to face a new direction.
+ * 
+ * @param entity Pointer to the entity to turn.
+ * @param direction The direction to face.
+ */
+void entityTurn(entity_t *entity, const entitydir_t direction);
+
+/**
+ * Make an entity walk in a direction.
+ * 
+ * @param entity Pointer to the entity to make walk.
+ * @param direction The direction to walk in.
+ */
+void entityWalk(entity_t *entity, const entitydir_t direction);

src/rpg/entity/entityanim.c

@@ -0,0 +1,9 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entityanim.h"
+

src/rpg/entity/entityanim.h

@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+
+#define ENTITY_ANIM_TURN_DURATION 1
+#define ENTITY_ANIM_WALK_DURATION 10
+
+typedef enum {
+  ENTITY_ANIM_IDLE,
+  ENTITY_ANIM_TURN,
+  ENTITY_ANIM_WALK,
+} entityanim_t;

src/rpg/entity/entitydir.c

@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entitydir.h"
+#include "assert/assert.h"
+
+void entityDirGetRelative(const entitydir_t from, int8_t *outX, int8_t *outY) {
+  assertValidEntityDir(from, "Invalid direction provided");
+  assertNotNull(outX, "Output X pointer cannot be NULL");
+  assertNotNull(outY, "Output Y pointer cannot be NULL");
+
+  switch(from) {
+    case ENTITY_DIR_NORTH:
+      *outX = 0;
+      *outY = -1;
+      break;
+
+    case ENTITY_DIR_EAST:
+      *outX = 1;
+      *outY = 0;
+      break;
+
+    case ENTITY_DIR_SOUTH:
+      *outX = 0;
+      *outY = 1;
+      break;
+
+    case ENTITY_DIR_WEST:
+      *outX = -1;
+      *outY = 0;
+      break;
+  }
+}

src/rpg/entity/entitydir.h

@@ -0,0 +1,45 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+
+typedef enum {
+  ENTITY_DIR_SOUTH = 0,
+  ENTITY_DIR_EAST = 1,
+  ENTITY_DIR_WEST = 2,
+  ENTITY_DIR_NORTH = 3,
+
+  ENTITY_DIR_UP = ENTITY_DIR_NORTH,
+  ENTITY_DIR_DOWN = ENTITY_DIR_SOUTH,
+  ENTITY_DIR_LEFT = ENTITY_DIR_WEST,
+  ENTITY_DIR_RIGHT = ENTITY_DIR_EAST,
+} entitydir_t;
+
+/**
+ * Asserts a given direction is valid.
+ * 
+ * @param dir The direction to validate.
+ * @param msg The message to display if the assertion fails.
+ */
+#define assertValidEntityDir(dir, msg) \
+  assertTrue( \
+    (dir) == ENTITY_DIR_NORTH || \
+    (dir) == ENTITY_DIR_EAST || \
+    (dir) == ENTITY_DIR_SOUTH || \
+    (dir) == ENTITY_DIR_WEST, \
+    msg \
+  )
+
+/**
+ * Gets the relative x and y offsets for a given direction.
+ * 
+ * @param dir The direction to get offsets for.
+ * @param relX Pointer to store the relative x offset.
+ * @param relY Pointer to store the relative y offset.
+ */
+void entityDirGetRelative(const entitydir_t dir, int8_t *relX, int8_t *relY);

src/rpg/entity/player.c

@@ -12,6 +12,20 @@
 #include "util/memory.h"
 #include "time/time.h"
 
+typedef struct {
+  inputaction_t action;
+  entitydir_t direction;
+} playerinputdirmap_t;
+
+static const playerinputdirmap_t PLAYER_INPUT_DIR_MAP[] = {
+  { INPUT_ACTION_UP, ENTITY_DIR_NORTH },
+  { INPUT_ACTION_DOWN, ENTITY_DIR_SOUTH },
+  { INPUT_ACTION_LEFT, ENTITY_DIR_WEST },
+  { INPUT_ACTION_RIGHT, ENTITY_DIR_EAST },
+
+  { 0xFF, 0xFF }
+};
+
 void playerInit(entity_t *entity) {
   assertNotNull(entity, "Entity pointer cannot be NULL");
 }
@@ -19,47 +33,23 @@ void playerInit(entity_t *entity) {
 void playerMovement(entity_t *entity) {
   assertNotNull(entity, "Entity pointer cannot be NULL");
 
-  // Get movement angle as 0-> normalized vector.
-  vec2 dir = {
-    inputAxis(INPUT_ACTION_LEFT, INPUT_ACTION_RIGHT),
-    inputAxis(INPUT_ACTION_UP, INPUT_ACTION_DOWN)
-  };
-  if(dir[0] == 0 && dir[1] == 0) return;
-  glm_vec2_normalize(dir);
+  // Turn
+  const playerinputdirmap_t *dirMap = PLAYER_INPUT_DIR_MAP;
+  do {
+    if(!inputPressed(dirMap->action)) continue;
+    if(entity->direction == dirMap->direction) continue;
+    return entityTurn(entity, dirMap->direction);
+  } while((++dirMap)->action != 0xFF);
 
-  entity->velocity[0] += PLAYER_SPEED * dir[0] * TIME.fixedDelta;
-  entity->velocity[1] += PLAYER_SPEED * dir[1] * TIME.fixedDelta;
+  // Walk
+  dirMap = PLAYER_INPUT_DIR_MAP;
+  do {
+    if(!inputIsDown(dirMap->action)) continue;
+    if(entity->direction != dirMap->direction) continue;
+    return entityWalk(entity, dirMap->direction);
+  } while((++dirMap)->action != 0xFF);
 
-  // Update direction.
-  if(dir[0] > 0) {
-    if(entity->direction == DIRECTION_RIGHT) {
-      entity->direction = DIRECTION_RIGHT;
-    } else {
-      if(dir[1] < 0) {
-        entity->direction = DIRECTION_UP;
-      } else if(dir[1] > 0) {
-        entity->direction = DIRECTION_DOWN;
-      } else {
-        entity->direction = DIRECTION_RIGHT;
-      }
-    }
-  } else if(dir[0] < 0) {
-    if(entity->direction == DIRECTION_LEFT) {
-      entity->direction = DIRECTION_LEFT;
-    } else {
-      if(dir[1] < 0) {
-        entity->direction = DIRECTION_UP;
-      } else if(dir[1] > 0) {
-        entity->direction = DIRECTION_DOWN;
-      } else {
-        entity->direction = DIRECTION_LEFT;
-      }
-    }
-  } else if(dir[1] < 0) {
-    entity->direction = DIRECTION_UP; 
-  } else if(dir[1] > 0) {
-    entity->direction = DIRECTION_DOWN;
-  }
+  // Interaction
 }
 
 void playerInteraction(entity_t *entity) {
@@ -67,50 +57,4 @@ void playerInteraction(entity_t *entity) {
 
   if(!inputPressed(INPUT_ACTION_ACCEPT)) return;
   
-  physicsbox_t interactBox;
-
-  // Get direction vector
-  directionGetVec2(entity->direction, interactBox.min);
-
-  // Scale by interact range
-  glm_vec2_scale(interactBox.min, PLAYER_INTERACTION_RANGE, interactBox.min);
-
-  // Add entity position, this makes the center of the box.
-  glm_vec2_add(interactBox.min, entity->position, interactBox.min);
-
-  // Copy to max
-  glm_vec2_copy(interactBox.min, interactBox.max);
-  
-  // // Size of the hitbox
-  // vec2 halfSize = {
-  //   1 * PLAYER_INTERACTION_SIZE * 0.5f,
-  //   1 * PLAYER_INTERACTION_SIZE * 0.5f
-  // };
-
-  // // Subtract from min, add to max.
-  // glm_vec2_sub(interactBox.min, halfSize, interactBox.min);
-  // glm_vec2_add(interactBox.max, halfSize, interactBox.max);
-
-  // // For each entity
-  // entity_t *start = ENTITIES;
-  // entity_t *end = &ENTITIES[ENTITY_COUNT];
-  // vec2 otherSize = { 1, 1 };
-  // physicsbox_t otherBox;
-  // physicsboxboxresult_t result;
-
-  // do {
-  //   if(start->type != ENTITY_TYPE_NPC) continue;
-
-  //   // Setup other box.
-  //   glm_vec2_copy(start->position, otherBox.min);
-  //   glm_vec2_copy(start->position, otherBox.max);
-  //   glm_vec2_sub(otherBox.min, otherSize, otherBox.min);
-  //   glm_vec2_add(otherBox.min, otherSize, otherBox.max);
-    
-  //   physicsBoxCheckBox(interactBox, otherBox, &result);
-  //   if(!result.hit) continue;
-    
-  //   printf("Interacted with entity at (%.2f, %.2f)\n", start->position[0], start->position[1]);
-  //   break;
-  // } while(++start != end);
 }

src/rpg/rpg.c

@@ -27,11 +27,11 @@ errorret_t rpgInit(void) {
   entityInit(ent, ENTITY_TYPE_PLAYER);
   RPG_CAMERA.mode = RPG_CAMERA_MODE_FOLLOW_ENTITY;
   RPG_CAMERA.followEntity.followEntityId = ent->id;
-  ent->position[0] = 4, ent->position[1] = 4;
+  ent->position.x = 4, ent->position.y = 4;
 
   ent = &ENTITIES[1];
   entityInit(ent, ENTITY_TYPE_NPC);
-  ent->position[0] = 6, ent->position[1] = 6;
+  ent->position.x = 6, ent->position.y = 6;
 
   // All Good!
   errorOk();
@@ -51,9 +51,6 @@ void rpgUpdate(void) {
     if(ent->type == ENTITY_TYPE_NULL) continue;
     entityUpdate(ent);
   } while(++ent < &ENTITIES[ENTITY_COUNT]);
-
-  // Update the camera.
-  rpgCameraUpdate();
 }
 
 void rpgDispose(void) {

src/rpg/rpgcamera.c

@@ -14,19 +14,3 @@ rpgcamera_t RPG_CAMERA;
 void rpgCameraInit(void) {
   memoryZero(&RPG_CAMERA, sizeof(rpgcamera_t));
 }
-
-void rpgCameraUpdate(void) {
-  switch(RPG_CAMERA.mode) {
-    case RPG_CAMERA_MODE_FOLLOW_ENTITY:
-      if(RPG_CAMERA.followEntity.followEntityId >= ENTITY_COUNT) break;
-      entity_t *ent = &ENTITIES[RPG_CAMERA.followEntity.followEntityId];
-      if(ent->type == ENTITY_TYPE_NULL) break;
-      memoryCopy(
-        &RPG_CAMERA.position, ent->position, sizeof(RPG_CAMERA.position)
-      );
-      break;
-
-    default:
-      break;
-  }
-}

src/rpg/rpgcamera.h

@@ -6,7 +6,7 @@
  */
 
 #pragma once
-#include "dusk.h"
+#include "rpg/world/worldpos.h"
 
 typedef enum {
   RPG_CAMERA_MODE_FREE,
@@ -14,10 +14,10 @@ typedef enum {
 } rpgcameramode_t;
 
 typedef struct {
-  vec3 position;
   rpgcameramode_t mode;
 
   union {
+    worldpos_t free;
     struct {
       uint8_t followEntityId;
     } followEntity;
@@ -30,8 +30,3 @@ extern rpgcamera_t RPG_CAMERA;
  * Initializes the RPG camera.
  */
 void rpgCameraInit(void);
-
-/**
- * Updates the RPG camera.
- */
-void rpgCameraUpdate(void);

src/rpg/world/worldpos.h

@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+
+typedef struct worldpos_s {
+  uint32_t x, y, z;
+} worldpos_t;

src/scene/scene/scenemap.c

@@ -40,18 +40,68 @@ void sceneMapUpdate(scenedata_t *data) {
   
 }
 
+void sceneMapGetWorldPosition(const worldpos_t pos, vec3 outPosition) {
+  assertNotNull(outPosition, "Output position cannot be NULL");
+
+  outPosition[0] = pos.x * TILE_SIZE;
+  outPosition[1] = pos.y * TILE_SIZE;
+  outPosition[2] = pos.z * TILE_SIZE;
+}
+
+void sceneMapEntityGetPosition(const entity_t *entity, vec3 outPosition) {
+  assertNotNull(entity, "Entity cannot be NULL");
+  assertNotNull(outPosition, "Output position cannot be NULL");
+
+  sceneMapGetWorldPosition(entity->position, outPosition);
+
+  // Add animation offset(s)
+  switch(entity->animation) {
+    case ENTITY_ANIM_WALK:
+      float_t animPercentage = (
+        (float_t)entity->animFrame / (float_t)ENTITY_ANIM_WALK_DURATION
+      );
+
+      // Get facing rel, we know we moved from the inverse direction.
+      int8_t x, y;
+      entityDirGetRelative(entity->direction, &x, &y);
+      x = -x, y = -y;
+
+      // Add tile size times percentage to posMin/max
+      vec3 offset = {
+        x * TILE_SIZE * animPercentage,
+        y * TILE_SIZE * animPercentage,
+        0.0f
+      };
+      glm_vec3_add(outPosition, offset, outPosition);
+      break;
+
+    default:
+      break;
+  }
+}
+
+
 void sceneMapRender(scenedata_t *data) {
   // Look at target.
-  glm_vec3_scale(
-    RPG_CAMERA.position,
-    TILE_SIZE,
-    data->sceneMap.camera.lookatPixelPerfect.target
-  );
+  vec3 cameraTarget;
+  switch(RPG_CAMERA.mode) {
+    case RPG_CAMERA_MODE_FREE:
+      sceneMapGetWorldPosition(RPG_CAMERA.free, cameraTarget);
+      break;
 
-  // Center within tile
-  glm_vec3_add(
-    data->sceneMap.camera.lookatPixelPerfect.target,
-    (vec3){TILE_SIZE / 2.0f, TILE_SIZE / 2.0f, TILE_SIZE / 2.0f },
+    case RPG_CAMERA_MODE_FOLLOW_ENTITY: {
+      const entity_t *ent = &ENTITIES[RPG_CAMERA.followEntity.followEntityId];
+      sceneMapEntityGetPosition(ent, cameraTarget);
+      break;
+    }
+
+    default:
+      glm_vec3_zero(cameraTarget);
+      break;
+  }
+
+  glm_vec3_copy(
+    cameraTarget,
     data->sceneMap.camera.lookatPixelPerfect.target
   );
 
@@ -74,14 +124,36 @@ void sceneMapRenderEntity(entity_t *entity) {
 
   if(entity->type == ENTITY_TYPE_NULL) return;
 
-  vec3 posMin, posMax;
-  glm_vec3_scale(entity->position, TILE_SIZE, posMin);
-  glm_vec3_add(posMin, (vec3){TILE_SIZE, TILE_SIZE, TILE_SIZE }, posMax);
+  vec3 posCenter, posMin, posMax;
+  vec3 halfSize = { TILE_SIZE / 2.0f, TILE_SIZE / 2.0f, TILE_SIZE / 2.0f };
+  sceneMapEntityGetPosition(entity, posCenter);
+  glm_vec3_sub(posCenter, halfSize, posMin);
+  glm_vec3_add(posCenter, halfSize, posMax);
+
+  // TEST: Change color depending on dir.
+  color_t testColor;
+  switch(entity->direction) {
+    case ENTITY_DIR_NORTH:
+      testColor = COLOR_BLUE;
+      break;
+    case ENTITY_DIR_EAST:
+      testColor = COLOR_GREEN;
+      break;
+    case ENTITY_DIR_SOUTH:
+      testColor = COLOR_CYAN;
+      break;
+    case ENTITY_DIR_WEST:
+      testColor = COLOR_YELLOW;
+      break;
+    default:
+      testColor = COLOR_WHITE;
+      break;
+  }
 
   vec2 uv0 = { 0.0f, 0.0f };
   vec2 uv1 = { 1.0f, 1.0f };
 
-  spriteBatchPush3D(NULL, posMin, posMax, COLOR_RED, uv0, uv1);
+  spriteBatchPush3D(NULL, posMin, posMax, testColor, uv0, uv1);
 }
 
 void sceneMapDispose(scenedata_t *data) {