add editor

5 files changed, 125 insertions, 25 deletions

diff --git a/src/editor.c b/src/editor.c
new file mode 100644
index 0000000..2cf2f84
--- /dev/null
+++ b/src/editor.c
@@ -0,0 +1,70 @@
+#include <raylib.h>
+#include <stdio.h>
+
+#include "tiled.h"
+
+int selectedTile[2] = {0, 0};
+
+void update(Tiled *tiled) {
+    updateTiledCamera(tiled);
+    Vector2 mousePos = GetMousePosition();
+    Vector2 mapPos = translateTiledPosition(*tiled, mousePos);
+    selectedTile[0] = mapPos.x;
+    selectedTile[1] = mapPos.y;
+}
+
+void drawOverlay(Tiled tiled) {
+    Vector2 screenPos = translateTiledScreenPosition(tiled, (Vector2){selectedTile[0], selectedTile[1]});
+    
+    DrawRectangleLinesEx((Rectangle) {
+                screenPos.x,
+                screenPos.y,
+                tiled.zoom,
+                tiled.zoom
+            }, tiled.zoom/16, GREEN);
+}
+
+void modifyTile(Tiled *tiled, int x) {
+    int tile = getTiledMapTile(tiled->tiledMap, selectedTile);
+    int tileCount = tiled->tiledMap.atlasSize[0] * tiled->tiledMap.atlasSize[1] + 1;
+    tile = (tile + x) % (tileCount);
+    setTiledMapTile(tiled->tiledMap, selectedTile, tile);
+    renderTilemapTexture(&tiled->tilemapTexture, tiled->tiledMap);
+}
+
+int launchEditor(TiledMap tiledMap) {
+    SetConfigFlags(FLAG_WINDOW_RESIZABLE);
+    InitWindow(SCREEN_W, SCREEN_H, "tiled");
+
+    Tiled tiled = initTiled(tiledMap);
+
+    while (!WindowShouldClose()) {
+        update(&tiled);
+
+        if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
+            modifyTile(&tiled, 1);
+
+        if (IsMouseButtonPressed(MOUSE_BUTTON_RIGHT))
+            modifyTile(&tiled, -1);
+
+        BeginDrawing();
+
+        ClearBackground(LIGHTGRAY);
+
+        drawTiled(&tiled);
+        drawOverlay(tiled);
+        DrawFPS(16, 16);
+
+        EndDrawing();
+    }
+
+    unloadTiled(&tiled);
+
+    CloseWindow();
+    return 0;
+}
+
+int main() {
+    TiledMap tiledMap = loadTiledMap("map.tiles");
+    launchEditor(tiledMap);
+}
diff --git a/src/tiled.c b/src/tiled.c
index 49f957f..82b29e0 100644
--- a/src/tiled.c
+++ b/src/tiled.c
@@ -3,9 +3,6 @@
 
 #include "tiled.h"
 
-#define SCREEN_W 1280
-#define SCREEN_H 720
-
 void updateCamera(Vector2 *offset, float *zoom) {
     if (IsKeyDown(KEY_UP)) offset->y += 16.0f / *zoom;
     if (IsKeyDown(KEY_DOWN)) offset->y -=  16.0f/ *zoom;
@@ -16,8 +13,8 @@ void updateCamera(Vector2 *offset, float *zoom) {
     if (IsKeyDown(KEY_S)) *zoom -= *zoom * 0.01f;
 }
 
-void drawOverlay() {
-    DrawText(TextFormat("FPS: %d", GetFPS()), 12, 12, 24, DARKGRAY);
+void updateTiledCamera(Tiled *tiled) {
+    updateCamera(&tiled->offset, &tiled->zoom);
 }
 
 
@@ -34,24 +31,41 @@ void initTiledShader(Tiled *tiled) {
     tiled->tilemapTextureLoc = GetShaderLocation(tiled->shader, "tilemapTexture");
 }
 
-void initTiled(Tiled *tiled, TiledMap tiledMap) {
-    tiled->offset = (Vector2) {0, 0};
-    tiled->zoom = 64;
-    tiled->mapSize[0] = tiled->tilemapTexture.width;
-    tiled->mapSize[1] = tiled->tilemapTexture.height;
-    tiled->targetTexture = LoadRenderTexture(1, 1);
+Vector2 translateTiledPosition(Tiled tiled, Vector2 screenPos) {
+    return (Vector2) {
+        screenPos.x / tiled.zoom - tiled.offset.x,
+        screenPos.y / tiled.zoom - tiled.offset.y
+    };
+}
+
+Vector2 translateTiledScreenPosition(Tiled tiled, Vector2 tiledPos) {
+    return (Vector2) {
+        (tiledPos.x + tiled.offset.x) * tiled.zoom,
+        (tiledPos.y + tiled.offset.y) * tiled.zoom
+    };
+}
+
+Tiled initTiled(TiledMap tiledMap) {
+    Tiled tiled;
+    tiled.tiledMap = tiledMap;
+    tiled.offset = (Vector2) {0, 0};
+    tiled.zoom = 64;
+    tiled.mapSize[0] = tiled.tilemapTexture.width;
+    tiled.mapSize[1] = tiled.tilemapTexture.height;
+    tiled.targetTexture = LoadRenderTexture(1, 1);
 
-    tiled->atlasSize[0] = tiledMap.atlasSize[0];
-    tiled->atlasSize[1] = tiledMap.atlasSize[1];
+    tiled.atlasSize[0] = tiledMap.atlasSize[0];
+    tiled.atlasSize[1] = tiledMap.atlasSize[1];
 
-    textureFromPixels(&tiled->atlasTexture,
+    textureFromPixels(&tiled.atlasTexture,
             tiledMap.atlasData,
             tiledMap.atlasSize[0] * tiledMap.tileSize,
             tiledMap.atlasSize[1] * tiledMap.tileSize);
 
-    renderTilemapTexture(&tiled->tilemapTexture, tiledMap);
 
-    initTiledShader(tiled);
+    renderTilemapTexture(&tiled.tilemapTexture, tiled.tiledMap);
+    initTiledShader(&tiled);
+    return tiled;
 }
 
 void setTiledShaderUniforms(Tiled tiled) {
@@ -73,8 +87,6 @@ void unloadTiled(Tiled *tiled) {
 }
 
 void drawTiled(Tiled *tiled) {
-    updateCamera(&tiled->offset, &tiled->zoom);
-
     BeginShaderMode(tiled->shader);
     setTiledShaderUniforms(*tiled);
 
@@ -85,24 +97,22 @@ void drawTiled(Tiled *tiled) {
     EndShaderMode();
 }
 
-int main() {
+int launchTiledView() {
     SetConfigFlags(FLAG_WINDOW_RESIZABLE);
     InitWindow(SCREEN_W, SCREEN_H, "tiled");
 
-    Tiled tiled;
     TiledMap tiledMap = loadTiledMap("map.tiles");
-    initTiled(&tiled, tiledMap);
-
-
+    Tiled tiled = initTiled(tiledMap);
 
     while (!WindowShouldClose()) {
+        updateTiledCamera(&tiled);
 
         BeginDrawing();
 
         ClearBackground(LIGHTGRAY);
 
         drawTiled(&tiled);
-        drawOverlay();
+        DrawFPS(16, 16);
 
         EndDrawing();
     }
diff --git a/src/tiled.h b/src/tiled.h
index f496dc6..e1f1c79 100644
--- a/src/tiled.h
+++ b/src/tiled.h
@@ -2,7 +2,11 @@
 
 #include "tiledfile.h"
 
+#define SCREEN_W 1280
+#define SCREEN_H 720
+
 typedef struct Tiled {
+    TiledMap tiledMap;
     float zoom;
     Vector2 offset;
 
@@ -26,6 +30,9 @@ typedef struct Tiled {
 
 } Tiled;
 
-void initTiled(Tiled *tiled, TiledMap tiledMap);
+void updateTiledCamera(Tiled *tiled);
+Vector2 translateTiledPosition(Tiled tiled, Vector2 screenPos);
+Vector2 translateTiledScreenPosition(Tiled tiled, Vector2 tiledPos);
+Tiled initTiled(TiledMap tiledMap);
 void drawTiled(Tiled *tiled);
 void unloadTiled(Tiled *tiled);
diff --git a/src/tiledfile.c b/src/tiledfile.c
index d6d4b1b..bf0a828 100644
--- a/src/tiledfile.c
+++ b/src/tiledfile.c
@@ -30,6 +30,7 @@ void renderTilemapTexture(Texture2D *texOut, TiledMap tiledMap) {
     textureFromPixels(texOut, pixels, tiledMap.width, tiledMap.height);
 }
 
+
 //! read rgba image from file
 void readrgba(Texture2D *loc, int width, int height, FILE *file) {
     Color *pixels = malloc(width*height*4);
@@ -57,6 +58,14 @@ int readb(char * out, size_t noBytes, FILE * file) {
     return 0;
 }
 
+char getTiledMapTile(TiledMap tiledMap, int pos[2]) {
+    return tiledMap.tilelayout[pos[1]*tiledMap.width + pos[0]];
+}
+
+void setTiledMapTile(TiledMap tiledMap, int pos[2], char tile) {
+    tiledMap.tilelayout[pos[1]*tiledMap.width + pos[0]] = tile;
+}
+
 //! load tilemap data from file
 TiledMap loadTiledMap(char * filename) {
     TiledMap tiledMap;
diff --git a/src/tiledfile.h b/src/tiledfile.h
index 929dabc..906bfdc 100644
--- a/src/tiledfile.h
+++ b/src/tiledfile.h
@@ -13,4 +13,8 @@ void textureFromPixels(Texture2D *texOut, Color *pixels, int width, int height);
 
 void renderTilemapTexture(Texture2D *texOut, TiledMap tiledMap);
 
+void setTiledMapTile(TiledMap tiledMap, int pos[2], char tile);
+
+char getTiledMapTile(TiledMap tiledMap, int pos[2]);
+
 TiledMap loadTiledMap(char * filename);