Added some basic font rendering and texas holdem

include/dawn/cards/card.h

@@ -0,0 +1,99 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "../libs.h"
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Cards
+////////////////////////////////////////////////////////////////////////////////
+
+// Aces
+#define CARD_CLUBS_ACE 0x00
+#define CARD_CLUBS_TWO 0x01
+#define CARD_CLUBS_THREE 0x02
+#define CARD_CLUBS_FOUR 0x03
+#define CARD_CLUBS_FIVE 0x04
+#define CARD_CLUBS_SIX 0x05
+#define CARD_CLUBS_SEVEN 0x06
+#define CARD_CLUBS_EIGHT 0x07
+#define CARD_CLUBS_NINE 0x08
+#define CARD_CLUBS_TEN 0x09
+#define CARD_CLUBS_JACK 0x0A
+#define CARD_CLUBS_QUEEN 0x0B
+#define CARD_CLUBS_KING 0x0C
+
+// Diamonds
+#define CARD_DIAMONDS_ACE 0x0D
+#define CARD_DIAMONDS_TWO 0x0E
+#define CARD_DIAMONDS_THREE 0x0F
+#define CARD_DIAMONDS_FOUR 0x10
+#define CARD_DIAMONDS_FIVE 0x11
+#define CARD_DIAMONDS_SIX 0x12
+#define CARD_DIAMONDS_SEVEN 0x13
+#define CARD_DIAMONDS_EIGHT 0x14
+#define CARD_DIAMONDS_NINE 0x15
+#define CARD_DIAMONDS_TEN 0x16
+#define CARD_DIAMONDS_JACK 0x17
+#define CARD_DIAMONDS_QUEEN 0x18
+#define CARD_DIAMONDS_KING 0x19
+
+// Hearts
+#define CARD_HEARTS_ACE 0x1A
+#define CARD_HEARTS_TWO 0x1B
+#define CARD_HEARTS_THREE 0x1C
+#define CARD_HEARTS_FOUR 0x1D
+#define CARD_HEARTS_FIVE 0x1E
+#define CARD_HEARTS_SIX 0x1F
+#define CARD_HEARTS_SEVEN 0x20
+#define CARD_HEARTS_EIGHT 0x21
+#define CARD_HEARTS_NINE 0x22
+#define CARD_HEARTS_TEN 0x23
+#define CARD_HEARTS_JACK 0x24
+#define CARD_HEARTS_QUEEN 0x25
+#define CARD_HEARTS_KING 0x26
+
+// Spades
+#define CARD_SPADES_ACE 0x27
+#define CARD_SPADES_TWO 0x28
+#define CARD_SPADES_THREE 0x29
+#define CARD_SPADES_FOUR 0x2A
+#define CARD_SPADES_FIVE 0x2B
+#define CARD_SPADES_SIX 0x2C
+#define CARD_SPADES_SEVEN 0x2D
+#define CARD_SPADES_EIGHT 0x2E
+#define CARD_SPADES_NINE 0x2F
+#define CARD_SPADES_TEN 0x30
+#define CARD_SPADES_JACK 0x31
+#define CARD_SPADES_QUEEN 0x32
+#define CARD_SPADES_KING 0x33
+
+// Special Cards
+#define CARD_RED_JOKER 0x34
+#define CARD_BLACK_JOKER 0x35
+
+////////////////////////////////////////////////////////////////////////////////
+// Suits
+////////////////////////////////////////////////////////////////////////////////
+#define CARD_SUIT_CLUBS 0x01
+#define CARD_SUIT_DIAMONDS 0x02
+#define CARD_SUIT_HEARTS 0x03
+#define CARD_SUIT_SPADES 0x04
+
+
+/** Count of cards in each suit */
+#define CARD_COUNT_PER_SUIT 13
+
+/** Standard Card Deck Size */
+#define CARD_DECK_SIZE 52
+
+/** Full Card Deck Size */
+#define CARD_DECK_SIZE_FULL 54
+
+/** Type Representing a card's id */
+typedef uint8_t card_t;

include/dawn/cards/poker/holdem.h

@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "../card.h"
+#include "../../display/spritebatch.h"
+#include "../../display/texture.h"
+#include "../../display/tileset.h"
+
+/** How many cards a player can hold in their hand */
+#define HOLDEM_PLAYER_HAND 2
+/** How many cards the dealer can hold in their hand */
+#define HOLDEM_DEALER_HAND 5
+/** How many players in a holdem game (excludes dealer) */
+#define HOLDEM_PLAYER_COUNT 5
+
+/** State for whether or not a player has folded */
+#define HOLDEM_STATE_FOLDED 0x01
+/** State for whether or not a player is showing their hand */
+#define HOLDEM_STATE_SHOWING 0x02
+
+/** Texas Hold'em Player State */
+typedef struct {
+  /** Cards in the players' hand */
+  card_t cards[HOLDEM_PLAYER_HAND];
+  uint8_t cardCount;
+
+  /** Current State of player */
+  uint8_t state;
+  
+  /** Chips in players' posession */
+  uint32_t chips;
+  
+  /** Current bet in current round player has placed */
+  uint32_t currentBet;
+} holdemplayer_t;
+
+/** Representation of a Texas Hold'em Game State */
+typedef struct {
+  /** Current Card Deck */
+  card_t deck[CARD_DECK_SIZE];
+  /** Count of cards in the deck */
+  uint8_t deckSize;
+
+  /** How big is the current small blind */
+  uint32_t blindSmall;
+  /** How big is the current big blind */
+  uint32_t blindBig;
+  /** Current round pot */
+  uint32_t pot;
+
+  /** Cards that have been dealt */
+  card_t cards[HOLDEM_DEALER_HAND];
+  /** How many dealt cards are face up */
+  uint8_t cardsFacing;
+
+  /** Player States */
+  holdemplayer_t players[HOLDEM_PLAYER_COUNT];
+} holdemgame_t;
+
+typedef struct {
+  spritebatch_t *batch;
+  texture_t *texture;
+  tileset_t *tileset;
+} holdemrender_t;

include/dawn/dawn.h

@@ -6,6 +6,7 @@
 #pragma once
 #include "libs.h"
 
+// Display / Rendering
 #include "display/camera.h"
 #include "display/primitive.h"
 #include "display/render.h"
@@ -14,15 +15,24 @@
 #include "display/texture.h"
 #include "display/tileset.h"
 
+// File / Asset Management
 #include "file/asset.h"
 
+// Game Logic / Game Time Management
 #include "game/game.h"
 #include "game/gametime.h"
 
+// Player Input
 #include "input/input.h"
 
+// Poker Game Logic
+#include "cards/card.h"
+#include "cards/poker/holdem.h"
+
+// Utility Objects
 #include "util/list.h"
 
+// 3D Tile Game World
 #include "world/entity/entity.h"
 #include "world/map/chunk.h"
 #include "world/map/map.h"

include/dawn/display/tileset.h

@@ -16,6 +16,9 @@ typedef struct {
   /** Count of X/Y divisions */
   int32_t columns, rows;
 
+  /** Size of each divison (in pixels) */
+  float divX, divY;
+
   /** Count of divisions (unused) */
   int32_t count;
 

include/dawn/game/gametime.h

@@ -31,10 +31,14 @@ typedef struct {
   float last;
 
   /**
-   * Fixed timestep that occured since the last frame. Typically locked to 1/60
+   * Varying timestep that occured since the last frame. 
-   * steps per second.
    */
   float delta;
+
+  /**
+   * Fixed timestep that is not affected by framerate but remains consistent.
+   */
+  float fixedDelta;
 } gametime_t;
 
 extern gametime_t TIME_STATE;

include/dawn/world/entity/entity.h

@@ -8,6 +8,13 @@
 #pragma once
 #include "../../libs.h"
 #include "../../display/spritebatch.h"
+#include "../../display/texture.h"
+#include "../../display/tileset.h"
+
+/** Entity Texture Information */
+#define ENTITY_ASSET_TEXTURE "world/entity.png"
+#define ENTITY_WIDTH 32
+#define ENTITY_HEIGHT ENTITY_WIDTH
 
 /** Entity ID Definitions */
 #define ENTITY_TYPE_NULL 0x00
@@ -19,6 +26,13 @@
 /** Count of different types of entities */
 #define ENTITY_TYPE_COUNT ENTITY_TYPE_PLAYER + 1
 
+#define ENTITY_DIRECTION_SOUTH  0x00
+#define ENTITY_DIRECTION_NORTH  0x01
+#define ENTITY_DIRECTION_WEST   0x02
+#define ENTITY_DIRECTION_EAST   0x03
+
+#define ENTITY_STATE_WALKING 0x01
+
 /** Unique Entity ID */
 typedef uint8_t entityid_t;
 
@@ -31,12 +45,15 @@ typedef struct {
   int32_t gridX, gridY, gridZ;
   int32_t oldGridX, oldGridY, oldGridZ;
   float positionX, positionY, positionZ;
+  uint8_t direction;
+  uint32_t state;
 } entity_t;
 
 /** Definition for an entity type */
 typedef struct {
   void (*entityInit)(entityid_t entityId, entity_t *entity);
   void (*entityUpdate)(entityid_t entityId, entity_t *entity);
+  void (*entityRender)(entityid_t entityId, entity_t *entity);
   void (*entityDispose)(entityid_t entityId, entity_t *entity);
 } entitytype_t;
 
@@ -47,6 +64,12 @@ typedef struct {
 
   /** Sprite Batch in the state */
   spritebatch_t *spriteBatch;
+
+  /** Texture for entities */
+  texture_t *texture;
+
+  /** Divided Tileset for entities */
+  tileset_t *tileset;
 } entitystate_t;
 
 /** Global Entity State */

src/card/card.c

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "card.h"
+
+void cardDeckFill(card_t *deck) {
+  uint8_t i;
+  for(i = 0; i < CARD_DECK_SIZE; i++) {
+    deck[i] = i;
+  }
+}
+
+void cardShuffle(card_t *hand, uint8_t cardCount) {
+  uint8_t i, j;
+  card_t temporary;
+  for(i = 0; i < cardCount - 1; i++) {
+    // Select random element from remaining elements.
+    j = u8randRange(i, cardCount);
+    temporary = hand[j];// Take out other card
+    hand[j] = hand[i];// Move my card there
+    hand[i] = temporary;// Put other card here.
+  }
+}
+
+void cardDeal(card_t *deck, card_t *hand, uint8_t deckSize, uint8_t handSize) {
+  card_t card;
+  card = deck[deckSize-1];
+  deck[deckSize-1] = 0x00;
+  hand[handSize] = card;
+}

src/card/card.h

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include <dawn/dawn.h>
+#include "../util/rand.h"
+
+/**
+ * Fills a deck with a standard set of cards (unshuffled)
+ * 
+ * @param deck Deck to fill. Must be at least 52 elements.
+ */
+void cardDeckFill(card_t *deck);
+
+/**
+ * Shuffles the given hand or deck.
+ * 
+ * @param hand The hand/deck to shuffle.
+ * @param cardCount The amount of cards that are in that deck/hand.
+ */
+void cardShuffle(card_t *hand, uint8_t cardCount);
+
+/**
+ * Deals a card of the top of the deck into the given hand.
+ * 
+ * @param deck Deck to take from.
+ * @param hand Hand to put into.
+ * @param deckSize Size of the current deck.
+ * @param handSize Size of the current hand.
+ */
+void cardDeal(card_t *deck, card_t *hand, uint8_t deckSize, uint8_t handSize);

src/card/poker/holdem.c

@@ -0,0 +1,169 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "holdem.h"
+
+void holdemGameInit(holdemgame_t *game) {
+  uint8_t i;
+  holdemplayer_t *player;
+
+  // Set Blinds to nil.
+  game->blindBig = 0;
+  game->blindSmall = 0;
+
+  // Reset the players
+  for(i = 0; i < HOLDEM_PLAYER_COUNT; i++) {
+    player = game->players + i;
+
+    // Set their state to 0
+    player->state = 0x00;
+
+    // Set their chips to zero
+    player->chips = 0;
+  }
+}
+
+void holdemRoundInit(holdemgame_t *game) {
+  uint8_t i;
+  holdemplayer_t *player;
+
+  // Refill the deck
+  cardDeckFill(game->deck);
+  game->deckSize = CARD_DECK_SIZE;
+
+  // Reset the pot
+  game->pot = 0;
+
+  // Reset the cards
+  game->cardsFacing = 0;
+  
+  // Reset the players
+  for(i = 0; i < HOLDEM_PLAYER_COUNT; i++) {
+    player = game->players + i;
+
+    // Clear Round State(s)
+    player->state &= ~(
+      HOLDEM_STATE_FOLDED | 
+      HOLDEM_STATE_SHOWING
+    );
+
+    player->cardCount = 0;
+
+    // Set the players' current bet to zero.
+    player->currentBet = 0;
+  }
+}
+
+void holdemDeal(holdemgame_t *game, holdemplayer_t *player) {
+  cardDeal(game->deck, player->cards, game->deckSize, player->cardCount);
+  game->deckSize--;
+  player->cardCount++;
+}
+
+void holdemDealAll(holdemgame_t *game, uint8_t count) {
+  uint8_t i, j;
+  for(i = 0; i < count; i++) {
+    for(j = 0; j < HOLDEM_PLAYER_COUNT; j++) {
+      holdemDeal(game, game->players + j);
+    }
+  }
+}
+
+void holdemFlop(holdemgame_t *game) {
+  if(game->cardsFacing >= HOLDEM_DEALER_HAND) return;
+  uint8_t i, count;
+
+
+  // Burn the card off the top
+  game->deckSize -= 1;
+
+  // Change count depending on facing
+  count = game->cardsFacing == 0 ? 0x03 : 0x01;
+
+  // Deal
+  for(i = 0; i < count; i++) {
+    cardDeal(game->deck, game->cards, game->deckSize, game->cardsFacing);
+    game->deckSize -= 1;
+    game->cardsFacing += 1;
+  }
+}
+
+void holdemRenderInit(holdemrender_t *render) {
+  render->batch = spriteBatchCreate(
+    CARD_DECK_SIZE + (HOLDEM_PLAYER_COUNT * HOLDEM_PLAYER_HAND)
+  );
+  render->texture = assetTextureLoad("cards_normal.png");
+  render->tileset = tilesetCreate(
+    CARD_COUNT_PER_SUIT, 6,
+    render->texture->width, render->texture->height,
+    0, 0, 0, 0
+  );
+}
+
+void holdemRenderCard(holdemrender_t *render, card_t card, bool faceUp, float x, float y, float z) {
+  int32_t i;
+  
+  if(faceUp) {
+    uint8_t suit = card / CARD_COUNT_PER_SUIT;
+    uint8_t num = card % CARD_COUNT_PER_SUIT;
+    i = num + ((
+      suit == 0 ? 2 :
+      suit == 1 ? 3 : 
+      suit == 2 ? 1 :
+      0
+    ) * CARD_COUNT_PER_SUIT);
+  } else {
+    i = 4 * render->tileset->columns;
+  }
+
+  tilesetdiv_t *div = render->tileset->divisions + i;
+
+  spriteBatchQuad(render->batch, -1,
+    x, y, z,
+    3, 4,
+    div->x0, div->y0, div->x1, div->y1
+  );
+}
+
+void holdemRender(holdemrender_t *render, holdemgame_t *game) {
+  uint8_t i, j;
+  holdemplayer_t *player;
+
+  shaderUseTexture(GAME_STATE.shaderWorld, render->texture);
+
+  // Flush
+  spriteBatchFlush(render->batch);
+
+  // Render Deck
+  for(i = 0; i < game->deckSize; i++) {
+    holdemRenderCard(render, game->deck[i], false, 0, 6, i * 0.05f);
+  }
+  for(i = 0; i < game->cardsFacing; i++) {
+    holdemRenderCard(render, game->cards[i], true, 0, -i*1.5, i * 0.05f);
+  }
+
+  // Render each players's hand
+  for(i = 0; i < HOLDEM_PLAYER_COUNT; i++) {
+    player = game->players + i;
+
+    for(j = 0; j < player->cardCount; j++) {
+      holdemRenderCard(render, player->cards[j], true,
+        4*(i+1), -(j * 1), j * 0.05f
+      );
+    }
+  }
+
+  // Draw
+  spriteBatchDraw(render->batch, 0, -1);
+}
+
+uint32_t holdemBet(holdemgame_t *game, holdemplayer_t *player, uint32_t amount) {
+  uint32_t realAmount = mathMin(player->chips, amount);
+  game->pot += realAmount;
+  player->chips -= realAmount;
+  return realAmount;
+}

src/card/poker/holdem.h

@@ -0,0 +1,85 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include <dawn/dawn.h>
+#include "../card.h"
+#include "../../util/rand.h"
+#include "../../display/spritebatch.h"
+#include "../../display/texture.h"
+#include "../../display/tileset.h"
+#include "../../display/shader.h"
+#include "../../file/asset.h"
+
+/**
+ * Initializes a Teax Hold'em Game for the first time.
+ * 
+ * @param game Game to initialize.
+ */
+void holdemGameInit(holdemgame_t *game);
+
+/**
+ * Initializes a Texas Hold'em Round for the first time. Does not affect the
+ * global game state.
+ * 
+ * @param game Game's round you want to initialize.
+ */
+void holdemRoundInit(holdemgame_t *game);
+
+/**
+ * Deals a card to the given player, does all the follow up.
+ * 
+ * @param game Game who's deck to deal from.
+ * @param player Player to deal into.
+ */
+void holdemDeal(holdemgame_t *game, holdemplayer_t *player);
+
+/**
+ * Deal cards to all players.
+ * 
+ * @param game Game and players to deal around.
+ * @param count Count of cards to deal to each player.
+ */
+void holdemDealAll(holdemgame_t *game, uint8_t count);
+
+/**
+ * Draw the flop, turn or river
+ * 
+ * @param game Game to flop/turn/river.
+ */
+void holdemFlop(holdemgame_t *game);
+
+
+/**
+ * Initialize the Texas Hold'em Renderer.
+ * 
+ * @param render Renderer to init.
+ */
+void holdemRenderInit(holdemrender_t *render);
+
+/**
+ * Renders a card.
+ * 
+ * @param render Renderer to render against
+ * @param card Card to render.
+ */
+void holdemRenderCard(holdemrender_t *render, card_t card, bool faceUp, float x, float y, float z);
+
+/** 
+ * Render an entire holdem game.
+ */
+void holdemRender(holdemrender_t *render, holdemgame_t *game);
+
+/**
+ * Takes the given bet from a player
+ * 
+ * @param game Game to add the bet to.
+ * @param player Player to take the bet from.
+ * @param amount Amount to try and take.
+ * @return The real amount that was taken, chips considered.
+ */
+uint32_t holdemBet(holdemgame_t *game, holdemplayer_t *player, uint32_t amount);

src/display/gui/font.c

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "font.h"
+
+tilesetdiv_t * fontGetCharacterDivision(tileset_t *tileset, char character) {
+  int32_t i = ((int32_t)character) - FONT_CHAR_START;
+  return tileset->divisions + i;
+}
+
+void fontSpriteBatchBuffer(spritebatch_t *batch, tileset_t *tileset,
+  char *string, float x, float y, float z, float charWidth, float charHeight
+) {
+  int32_t i;
+  char c;
+  tilesetdiv_t *div;
+  float cx, cy;
+
+  i = 0;
+  cx = x, cy = y;
+
+  while(true) {
+    c = string[i];
+    if(c == '\0') break;
+    i++;
+    
+    if(c == '\n') {
+      cx = x;
+      cy += charWidth;
+      continue;
+    } else if(c == ' ') {
+      cx += charHeight;
+      continue;
+    }
+
+    div = fontGetCharacterDivision(tileset, c);
+    spriteBatchQuad(batch, -1,
+      cx, cy, z, charWidth, charHeight,
+      div->x0, div->y0, div->x1, div->y1
+    );
+    cx += charWidth;
+  }
+}

src/display/gui/font.h

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include <dawn/dawn.h>
+#include "../spritebatch.h"
+
+#define FONT_CHAR_START 33
+
+tilesetdiv_t * fontGetCharacterDivision(tileset_t *tileset, char character);
+void fontSpriteBatchBuffer(spritebatch_t *batch, tileset_t *tileset,
+  char *string, float x, float y, float z, float charWidth, float charHeight
+);

src/display/tileset.c

@@ -14,7 +14,7 @@ tileset_t * tilesetCreate(
   int32_t borderX, int32_t borderY
 ) {
   tileset_t *tileset;
-  float divX, divY, tdivX;
+  float tdivX, tdivY;
   int32_t x, y, i;
 
   tileset = malloc(sizeof(tileset_t));
@@ -31,21 +31,30 @@ tileset_t * tilesetCreate(
   tileset->rows = rows;
 
   // Calculate division sizes (pixels)
-  divX = (width - (borderX * 2) - (gapX * (columns - 1))) / columns;
+  tileset->divX = (width - (borderX * 2) - (gapX * (columns - 1))) / columns;
-  divY = (height - (borderY * 2) - (gapY * (rows - 1))) / rows;
+  tileset->divY = (height - (borderY * 2) - (gapY * (rows - 1))) / rows;
 
   // Calculate the division sizes (units)
-  divX = divX / width;
+  tdivX = tileset->divX / width;
-  divY = divY / height;
+  tdivY = tileset->divY / height;
 
-  // Calculate the divisions
+  // Calculate the divisions (in units)
   i = -1;
   for(y = 0; y < rows; y++) {
     for(x = 0; x < columns; x++) {
-      tileset->divisions[++i].x0 = borderX + (divX * x) + (gapX * x);
+      tileset->divisions[++i].x0 = (
-      tileset->divisions[i].y0 = borderY + (divY * y) + (gapY * y);
+        borderX + (tileset->divX * x) + (gapX * x)
-      tileset->divisions[i].x1 = tileset->divisions[i].x0 + divX;
+      ) / width;
-      tileset->divisions[i].y1 = tileset->divisions[i].y0 + divY;
+      tileset->divisions[i].x1 = tileset->divisions[i].x0 + tdivX;
+
+      // tileset->divisions[i].y0 = (borderY + (divY * y) + (gapY * y)) / height;
+      // tileset->divisions[i].y1 = tileset->divisions[i].y0 + tdivY;
+
+      // Vertically flipped for OpenGL
+      tileset->divisions[i].y1 = (
+        borderY + (tileset->divY * y) + (gapY * y)
+      ) / height;
+      tileset->divisions[i].y0 = tileset->divisions[i].y1 + tdivY;
     }
   }
 

src/game/game.c

@@ -9,6 +9,12 @@
 
 game_t GAME_STATE;
 
+holdemgame_t holdem;
+holdemrender_t render;
+
+texture_t *fontTexture;
+spritebatch_t *fontBatch;
+
 bool gameInit() {
   // Init the game
   GAME_STATE.name = GAME_NAME;
@@ -19,13 +25,31 @@ bool gameInit() {
   inputInit();
   worldInit();
 
+  holdemGameInit(&holdem);
+  holdemRenderInit(&render);
+
+  holdemRoundInit(&holdem);
+  cardShuffle(holdem.deck, holdem.deckSize);
+
+  // Deal Card
+  holdemDealAll(&holdem, 2);
+  holdemFlop(&holdem);
+
+  fontTexture = assetTextureLoad("font.png");
+  fontBatch = spriteBatchCreate(100);
+  tileset_t *tileset = tilesetCreate(20, 20,
+    fontTexture->width, fontTexture->height,
+    1, 1, 1, 1
+  );
+
+  char *buffer = "!\"#$%";
+  fontSpriteBatchBuffer(fontBatch, tileset, buffer, 0, 0, 0, 1.1, 1.5);
+
   // Load the world shader.
   GAME_STATE.shaderWorld = assetShaderLoad(
     "shaders/test.vert", "shaders/test.frag"
   );
 
-  entityInit(0x00, 0x01);
-
   // Init the input manger.
   return true;
 }
@@ -39,16 +63,21 @@ bool gameUpdate(float platformDelta) {
   shaderUse(GAME_STATE.shaderWorld);
 
   // Set up the camera.
-  int32_t d = 10;
+  int x = 10;
-  cameraLookAt(&GAME_STATE.cameraWorld,  d, d, d,  0, 0, 0);
+  cameraLookAt(&GAME_STATE.cameraWorld, x, 2.5f, 50, x, 2, 0);
   cameraPerspective(&GAME_STATE.cameraWorld, 45.0f,
     ((float)RENDER_STATE.width) / ((float)RENDER_STATE.height),
     0.5f, 500.0f
   );
   shaderUseCamera(GAME_STATE.shaderWorld, &GAME_STATE.cameraWorld);
-  
+
+
+  shaderUseTexture(GAME_STATE.shaderWorld, fontTexture);
+  spriteBatchDraw(fontBatch, 0, -1);
+
+  // holdemRender(&render, &holdem);
   // Render the game scene.
-  worldRender();
+  // worldRender();
 
   if(inputIsPressed(INPUT_NULL)) return false;
   return true;

src/game/game.h

@@ -14,6 +14,11 @@
 #include "../world/world.h"
 #include "../world/entity/entity.h"
 
+#include "../card/poker/holdem.h"
+#include "../display/gui/font.h"
+#include "../display/spritebatch.h"
+#include "../display/tileset.h"
+
 /**
  * Initialize the game context.
  * 

src/game/gametime.c

@@ -24,4 +24,5 @@ void gameTimeUpdate(float platformDelta) {
   TIME_STATE.last = TIME_STATE.current;
   TIME_STATE.current = TIME_STATE.current + platformDelta;
   TIME_STATE.delta = TIME_STATE.current - TIME_STATE.last;
+  TIME_STATE.fixedDelta = GAMETIME_FIXED_STEP;
 }

src/platform/glfw/glwfwplatform.c

@@ -61,7 +61,7 @@ int32_t main() {
       // Tick the engine.
       if(!gameUpdate(fDelta)) break;
       glfwSwapBuffers(window);
-      sleep(0);
+      sleep(0);//Fixes some weird high CPU bug, not actually necessary.
     }
 
     // Game has finished running, cleanup.

src/util/math.h

@@ -5,6 +5,7 @@
 
 #pragma once
 
-#define mathMod(a,b) (a%b+b)%b
+#define mathMod(a,b)  (a%b+b)%b
-#define mathMax(a,b) (a<b?b:a)
+#define mathMax(a,b)  (a<b?b:a)
-#define mathMin(a,b) (a>b?b:a)
+#define mathMin(a,b)  (a>b?b:a)
+#define mathAbs(n)    (n<0?-n:n)

src/util/rand.h

@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include <dawn/dawn.h>
+
+/**
+ * Generate a number between 0 and max. (max exclusive)
+ * 
+ * @param max Max number to generate
+ * @return Number between 0 and max.
+ */
+#define u32rand(max) (rand()%max)
+#define u8rand(max) (uint8_t)u23rand(max)
+
+/**
+ * Generate a number between min and max. (max exclusive, min inclusive)
+ * 
+ * @param min Min number to generate.
+ * @param max Max number to generate.
+ * @return Number between min and max.
+ */
+#define u32randRange(min, max) (u32rand(max-min)+min)
+#define u8randRange(min, max) (uint8_t)u32randRange(min,max)

src/world/entity/common.c

@@ -7,10 +7,34 @@
 
 #include "common.h"
 
+void entityCommonMoveUpdate(entityid_t id, entity_t *entity) {
+  float x, y, z, delta;
+  x = entity->gridX - entity->positionX;
+  y = entity->gridY - entity->positionY;
+  z = entity->gridZ - entity->positionZ;
+
+  if(mathAbs(x) <= 0.05 && mathAbs(y) <= 0.05 && mathAbs(z) <= 0.05) {
+    entity->positionX = entity->gridX;
+    entity->positionY = entity->gridY;
+    entity->positionZ = entity->gridZ;
+    entity->state -= ENTITY_STATE_WALKING;
+    return;
+  }
+
+  // TODO: Change this from easing curve to linear.
+  delta = TIME_STATE.delta * ENTITY_COMMON_MOVE_SPEED;
+  entity->positionX += x == 0 ? 0 : x > 0 ? delta : -delta;
+  entity->positionY += y == 0 ? 0 : y > 0 ? delta : -delta;
+  entity->positionZ += z == 0 ? 0 : z > 0 ? delta : -delta;
+}
+
 void entityCommonMove(entityid_t id, entity_t *entity, int32_t x, int32_t y, int32_t z) {
   int32_t newX, newY, newZ, chunkIndex, tileIndex;
   tileid_t tileId;
 
+  // Update state.
+  entity->state |= ENTITY_STATE_WALKING;
+
   // Determine the new coordinates.
   newX = entity->gridX + x;
   newY = entity->gridY + y;
@@ -35,15 +59,18 @@ void entityCommonMove(entityid_t id, entity_t *entity, int32_t x, int32_t y, int
 }
 
 void entityCommonRender(entityid_t id, entity_t *entity) {
-  float d = TIME_STATE.delta * ENTITY_COMMON_MOVE_SPEED;
+  tilesetdiv_t div = tilesetGetDivision(ENTITY_STATE.tileset, 0, entity->direction);
-  entity->positionX += (entity->gridX - entity->positionX) * d;
-  entity->positionY += (entity->gridY - entity->positionY) * d;
-  entity->positionZ += (entity->gridZ - entity->positionZ) * d;
 
   // Render sprite
   spriteBatchQuad(ENTITY_STATE.spriteBatch, -1,
-    entity->positionX, entity->positionY, entity->positionZ + 0.16,
+    entity->positionX, entity->positionY, entity->positionZ + 0.01,
     1, 1,
-    0, 0, 1, 1
+    div.x0, div.y0, div.x1, div.y1
   );
+}
+
+void entityCommonTurn(entityid_t id, entity_t *entity, uint8_t dir) {
+  if(entity->direction == dir) return;
+  entity->direction = dir;
+  entity->state = ENTITY_STATE_WALKING;
 }

src/world/entity/common.h

@@ -8,9 +8,14 @@
 #pragma once
 #include <dawn/dawn.h>
 #include "../../display/spritebatch.h"
+#include "../../display/tileset.h"
 #include "../map/tile.h"
+#include "../map/chunk.h"
+#include "../../util/math.h"
 
-#define ENTITY_COMMON_MOVE_SPEED 10
+#define ENTITY_COMMON_MOVE_SPEED 3
 
+void entityCommonMoveUpdate(entityid_t id, entity_t *entity);
 void entityCommonMove(entityid_t id, entity_t *entity, int32_t x, int32_t y, int32_t z);
 void entityCommonRender(entityid_t id, entity_t *entity);
+void entityCommonTurn(entityid_t id, entity_t *entity, uint8_t dir);

src/world/entity/entities/player.c

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "player.h"
+
+void playerInit(entityid_t id, entity_t *entity) {
+}
+
+void playerUpdate(entityid_t id, entity_t *entity) {
+  // Movement
+  if(entity->state & ENTITY_STATE_WALKING) {
+    entityCommonMoveUpdate(id, entity);
+  } else {
+    if(inputIsPressed(INPUT_UP)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_NORTH);
+    } else if(inputIsPressed(INPUT_DOWN)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_SOUTH);
+    } else if(inputIsPressed(INPUT_LEFT)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_WEST);
+    } else if(inputIsPressed(INPUT_RIGHT)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_EAST);
+
+    } else if(inputIsDown(INPUT_UP)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_NORTH);
+      entityCommonMove(id, entity, 0, 1, 0);
+    } else if(inputIsDown(INPUT_DOWN)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_SOUTH);
+      entityCommonMove(id, entity, 0, -1, 0);
+    } else if(inputIsDown(INPUT_LEFT)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_WEST);
+      entityCommonMove(id, entity, -1, 0, 0);
+    } else if(inputIsDown(INPUT_RIGHT)) {
+      entityCommonTurn(id, entity, ENTITY_DIRECTION_EAST);
+      entityCommonMove(id, entity, 1, 0, 0);
+    }
+  }
+}
+
+void playerRender(entityid_t id, entity_t *entity) {
+  entityCommonRender(id, entity);
+}
+
+void playerDispose(entityid_t id, entity_t *entity) {
+}

src/world/entity/entities/player.h

@@ -7,9 +7,10 @@
 
 #pragma once
 #include <dawn/dawn.h>
-#include "common.h"
+#include "../common.h"
-#include "../../input/input.h"
+#include "../../../input/input.h"
 
 void playerInit(entityid_t entityId, entity_t *entity);
 void playerUpdate(entityid_t entityId, entity_t *entity);
+void playerRender(entityid_t entityId, entity_t *entity);
 void playerDispose(entityid_t entityId, entity_t *entity);

src/world/entity/entity.c

@@ -10,8 +10,22 @@
 entitystate_t ENTITY_STATE;
 
 void entityStateInit() {
+  // Reset the entities
   memset(ENTITY_STATE.entities, 0, sizeof(entity_t) * ENTITY_COUNT);
+
+  // Prepare the spritebatch.
   ENTITY_STATE.spriteBatch = spriteBatchCreate(ENTITY_COUNT);
+
+  // Load the texture
+  ENTITY_STATE.texture = assetTextureLoad(ENTITY_ASSET_TEXTURE);
+
+  // Divide the tileset
+  ENTITY_STATE.tileset = tilesetCreate(
+    ENTITY_STATE.texture->width/ENTITY_WIDTH,
+    ENTITY_STATE.texture->height/ENTITY_HEIGHT,
+    ENTITY_STATE.texture->width, ENTITY_STATE.texture->height,
+    0,0,0,0
+  );
 }
 
 void entityStateRender() {
@@ -21,14 +35,16 @@ void entityStateRender() {
   // Flush the batch.
   spriteBatchFlush(ENTITY_STATE.spriteBatch);
 
-  // Render the entities.
+  // Update and Render the entities.
   for(i = 0; i < ENTITY_COUNT; i++) {
     entity = ENTITY_STATE.entities + i;
     if(entity->type == ENTITY_TYPE_NULL) break;
     ENTITY_TYPES[entity->type].entityUpdate(i, entity);
+    ENTITY_TYPES[entity->type].entityRender(i, entity);
   }
 
   // Draw the sprite batch.
+  shaderUseTexture(GAME_STATE.shaderWorld, ENTITY_STATE.texture);
   shaderUsePosition(GAME_STATE.shaderWorld, 0, 0, 0, 0, 0, 0);
   spriteBatchDraw(ENTITY_STATE.spriteBatch, 0, -1);
 }

src/world/entity/entity.h

@@ -8,8 +8,11 @@
 #pragma once
 #include <dawn/dawn.h>
 #include "entitytypes.h"
+#include "../../file/asset.h"
 #include "../../display/spritebatch.h"
 #include "../../display/shader.h"
+#include "../../display/texture.h"
+#include "../../display/tileset.h"
 
 /**
  * Initializes the entity state system.

src/world/entity/entitytypes.c

@@ -9,12 +9,18 @@
 
 entitytype_t ENTITY_TYPES[ENTITY_TYPE_COUNT] = {
   // ENTITY_TYPE_NULL
-  { .entityInit = NULL, .entityUpdate = NULL, .entityDispose = NULL },
+  {
+    .entityInit = NULL,
+    .entityUpdate = NULL,
+    .entityRender = NULL,
+    .entityDispose = NULL
+  },
 
   // ENTITY_TYPE_PLAYER
   {
     .entityInit = &playerInit,
     .entityUpdate = &playerUpdate,
+    .entityRender = &playerRender,
     .entityDispose = &playerDispose
   }
 };

src/world/entity/entitytypes.h

@@ -7,4 +7,4 @@
 
 #pragma once
 #include <dawn/dawn.h>
-#include "player.h"
+#include "entities/player.h"

src/world/entity/player.c

@@ -1,29 +0,0 @@
-/**
- * Copyright (c) 2021 Dominic Masters
- * 
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#include "player.h"
-
-void playerInit(entityid_t id, entity_t *entity) {
-}
-
-void playerUpdate(entityid_t id, entity_t *entity) {
-  if(inputIsPressed(INPUT_UP)) {
-    entityCommonMove(id, entity, 0, 1, 0);
-  } else if(inputIsPressed(INPUT_DOWN)) {
-    entityCommonMove(id, entity, 0, -1, 0);
-  } else if(inputIsPressed(INPUT_LEFT)) {
-    entityCommonMove(id, entity, -1, 0, 0);
-  } else if(inputIsPressed(INPUT_RIGHT)) {
-    entityCommonMove(id, entity, 1, 0, 0);
-  }
-
-  // Render sprite
-  entityCommonRender(id, entity);
-}
-
-void playerDispose(entityid_t id, entity_t *entity) {
-}

src/world/map/chunk.c

@@ -12,10 +12,12 @@ void chunkLoad(chunk_t *chunk, int32_t x, int32_t y, int32_t z) {
   tiledef_t *tileDef;
   int32_t i, indiceCount, verticeCount, tx, ty, tz;
 
-  chunk->tiles[0] = 1;
+  for(ty = 0; ty < CHUNK_HEIGHT; ty++) {
-  chunk->tiles[1] = 1;
+    for(tx = 0; tx < CHUNK_WIDTH; tx++) {
-  chunk->tiles[16] = 1;
+      if(z != 0) break;
-  chunk->tiles[17] = 1;
+      chunk->tiles[ty*CHUNK_WIDTH + tx] = ty == 5 ? 2 : 1;
+    }
+  }
 
   // Start by loading the tiles and figuring out how big we need to make the
   // primitive that the chunk uses.

src/world/world.c

@@ -13,6 +13,17 @@ void worldInit() {
 }
 
 void worldRender() {
+  if(ENTITY_STATE.entities[0].type != ENTITY_TYPE_NULL) {
+    cameraLookAt(&GAME_STATE.cameraWorld,
+      ENTITY_STATE.entities[0].positionX,
+      ENTITY_STATE.entities[0].positionY - 0.5,
+      ENTITY_STATE.entities[0].positionZ + 7,
+
+      ENTITY_STATE.entities[0].positionX,
+      ENTITY_STATE.entities[0].positionY,
+      ENTITY_STATE.entities[0].positionZ
+    );
+  }
   mapRender();
   entityStateRender();
 }

src/world/world.h

@@ -9,6 +9,7 @@
 #include <dawn/dawn.h>
 #include "map/map.h"
 #include "entity/entity.h"
+#include "../display/camera.h"
 
 void worldInit();
 void worldRender();