From 61e47d523653e7a151d8ab17d6dced5864b5d280 Mon Sep 17 00:00:00 2001
From: Luke Bratch <l_bratch@yahoo.co.uk>
Date: Tue, 21 Dec 2010 18:39:05 +0000
Subject: Level: Implement hazards

---
 Level.cpp | 38 +++++++++++++++++++++++++++++++++++---
 Level.h   |  5 +++++
 2 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/Level.cpp b/Level.cpp
index 8e9def4..6655777 100644
--- a/Level.cpp
+++ b/Level.cpp
@@ -102,8 +102,8 @@ void Level::move() {
 
     player.setY(rect.y);
 
-    // Kill the player if they fall off the screen
-    if (player.getY() > SCREEN_HEIGHT) {
+    // Kill the player if they fall off the screen or touch a hazard
+    if (player.getY() > SCREEN_HEIGHT || checkCollision(rect) == 2) {
         player.kill();
         player.setX(startX);
         player.setY(startY);
@@ -147,12 +147,23 @@ void Level::draw(Screen *screen) {
                          platform[0].image, platform[i].getClip());
         }
     }
+
+    // Draw each hazard...
+    for (int i = 0; i < numHazards; i++) {
+        // ...if it is visible
+        if (hazard[i].getX() + TILE_SIZE + cameraX >= 0 && hazard[i].getX()
+            + cameraX <= SCREEN_WIDTH) {
+            screen->blit(hazard[i].getX() + cameraX, hazard[i].getY(),
+                         hazard[0].image, hazard[i].getClip());
+        }
+    }
 }
 
 void Level::loadMap(int LevelNo) {
     numPlatforms = 0;
     // TODO: Let each Platform have a reference a single tiles image
     platform[0].setImage("tiles.png");
+    hazard[0].setImage("tiles.png");
 
     // Open map file
     std::ifstream map("level01.map");
@@ -180,6 +191,15 @@ void Level::loadMap(int LevelNo) {
             platform[numPlatforms].setClip(0, TILE_SIZE * (type - 1), 0, TILE_SIZE, TILE_SIZE);
 
             numPlatforms++;
+        } else if (type == 3) {
+            // Set x/y-coordinates
+            hazard[numHazards].setX((i % MAP_X) * TILE_SIZE);
+            hazard[numHazards].setY((i / MAP_X) * TILE_SIZE);
+
+            // Set the correct sprite sheet clip
+            hazard[numHazards].setClip(0, TILE_SIZE * (type - 1), 0, TILE_SIZE, TILE_SIZE);
+
+            numHazards++;
         } else if (type == 'P') {
             // Set the player starting position
             startX = (i % MAP_X) * TILE_SIZE;
@@ -193,8 +213,11 @@ void Level::loadMap(int LevelNo) {
 
 /*  Return values:
     0: No collision
-    1: Platform */
+    1: Platform
+    2: Hazard */
 int Level::checkCollision(SDL_Rect r) {
+    // TODO: Try to avoid separate loops for each type of MapObject
+
     // Loop through each platform
     for (int i = 0; i < numPlatforms; i++) {
         // Check for collisions in the x-axis ...
@@ -204,5 +227,14 @@ int Level::checkCollision(SDL_Rect r) {
                 return 1;
     }
 
+    // Loop through each hazard
+    for (int i = 0; i < numHazards; i++) {
+        // Check for collisions in the x-axis ...
+        if (r.x > hazard[i].getX() - r.w && r.x < hazard[i].getX() + TILE_SIZE)
+            // ... if found, check for collisions in the y-axis
+            if (r.y > hazard[i].getY() - r.h && r.y < hazard[i].getY() + TILE_SIZE)
+                return 2;
+    }
+
     return 0;
 }
diff --git a/Level.h b/Level.h
index 0a38029..b212c67 100644
--- a/Level.h
+++ b/Level.h
@@ -4,6 +4,7 @@
 #include "Player.h"
 #include "Screen.h"
 #include "Platform.h"
+#include "Hazard.h"
 
 class Level {
     public:
@@ -29,6 +30,10 @@ class Level {
         int numPlatforms;
         Platform platform[576];
 
+        // Hazards
+        int numHazards;
+        Hazard hazard[576];
+
         // Reads in the map file
         void loadMap(int levelNo);
 
-- 
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