Diff: GameEngine/SnakevsBlock/SnakevsBlock.cpp

Revision:

82:c51ae8a501d1

Parent:

81:4c1641e10dcd

Child:

83:329da564799a

--- a/GameEngine/SnakevsBlock/SnakevsBlock.cpp	Mon May 06 09:05:09 2019 +0000
+++ b/GameEngine/SnakevsBlock/SnakevsBlock.cpp	Mon May 06 10:49:50 2019 +0000
@@ -145,6 +145,8 @@
     SnakevsBlock::CheckSnakeFoodCollision(pad); //Function checks for when the snake collides with it's food.
     SnakevsBlock::CheckSnakeBlockCollision(pad); //Function checks for when the snake collides with any of the blocks.
     SnakevsBlock::CheckSnakeBlockSidesCollision(pad); //Function checks for when the snake collides with any of the blocks' sides.
+    SnakevsBlock::CheckSnakeBarrierCollision(pad, 0); //Function checks for when the snake collides with barrier A.
+    SnakevsBlock::CheckSnakeBarrierCollision(pad, 1); //Function checks for when the snake collides with barrier B.
     _s.update(_d, b); //_d is the direction of joystick and b controls the motion of a section of the snake relative to obstruction
     _f.update();
     _ff.update();
@@ -198,6 +200,8 @@
     for(int i = 0; i <= 9; i++)  {
         snake_pos[i] = _s.get_pos(i); //gets the position of the each beed from the snake class and saves in array.
     }
+    bar_pos[0] = _barA.get_pos(); //gets the position of the barrier A's origin from barriers class and saves in array.
+    bar_pos[1] = _barB.get_pos(); //gets the position of the barrier B's origin from barriers class and saves in array.
 }
 
 
@@ -379,17 +383,67 @@
         ((snake_pos[i].x == X + 1) ||  //W
          (snake_pos[i].x + 1 == X + 1))&&(_d != E)&&(_virtualLength > i) //W
     ) {
-        SnakevsBlock::ImplementSnakeBlockSidesCollision(i);
+        SnakevsBlock::ImplementBarrierCollision(i);
     }
     //for East side of walls
     else if (
         ((snake_pos[i].x + 1 == X - 1) ||  //E
          (snake_pos[i].x + 2 == X - 1))&&(_d != W)&&(_virtualLength > i) //E
     ) {
-        SnakevsBlock::ImplementSnakeBlockSidesCollision(i);
+        SnakevsBlock::ImplementBarrierCollision(i);
     }
 }
 
+
+void SnakevsBlock::CheckSnakeBarrierCollision(Gamepad &pad, int bar_sr_no)
+{
+    //If statements check if the snake sprite has collided with any
+    //of the barrier's sides and then stop the snake moving in x axis
+
+    for(int i=0; i<=9; i++)  { //i checks for all possible collisions with the snake respective to it's length.
+        SnakevsBlock::CheckSnakeBarrierYCollision(i, bar_sr_no); //checks if the snake and the block are at the same position in y axis.
+    }
+
+}
+
+void SnakevsBlock::CheckSnakeBarrierYCollision(int i, int bar_sr_no)  //i is the index of the snake beed and checks for all possible collisions with the snake respective to it's length.
+{
+    //This code checks if the snake and the block overlap in the Y axis.
+    for(int Y=0; Y<=21; Y++)  { //this carries out the next stage if the Y axis collision criterion is met.
+        if (
+            (snake_pos[i].y == bar_pos[bar_sr_no].y + Y) ||
+            (snake_pos[i].y + 1 == bar_pos[bar_sr_no].y + Y) ||
+            (snake_pos[i].y + 2 == bar_pos[bar_sr_no].y + Y)
+        )  {
+            SnakevsBlock::CheckSnakeBarrierEastWestCollision(i, bar_sr_no); //checks if the colliding barrier is on east side or west side.
+
+        }
+    }
+}
+
+void SnakevsBlock::CheckSnakeBarrierEastWestCollision(int i, int bar_sr_no) //i checks for all possible collisions with the snake respective to it's length.
+{
+    //bar_pos[0].x and bar_pos[1].x are used to confirm collision of snake with the barriers in the X axis.
+    //For West side of walls
+    if(
+        ((snake_pos[i].x == bar_pos[bar_sr_no].x + 1) ||  //W
+         (snake_pos[i].x + 1 == bar_pos[bar_sr_no].x + 1))&&(_d != E)&&(_virtualLength > i) //W
+    ) {
+        SnakevsBlock::ImplementBarrierCollision(i);
+    }
+    //for East side of walls
+    else if (
+        ((snake_pos[i].x + 1 == bar_pos[bar_sr_no].x - 1) ||  //E
+         (snake_pos[i].x + 2 == bar_pos[bar_sr_no].x - 1))&&(_d != W)&&(_virtualLength > i) //E
+    ) {
+        SnakevsBlock::ImplementBarrierCollision(i);
+    }
+}
+
+
+////////////////////////////USED IN BOTH BLOCK SIDES COLLISION AND BARRIER COLLISION////////////////////////////
+
+//Also used to send length to snake class as the max length drawn must also be 10
 void SnakevsBlock::makeVirtualLengthMaxTen()
 {
     //this makes the virtual length -> 10 for the side collision implementation because if the length is fifteen and the last beed collides, it still is the 10th beed
@@ -399,8 +453,8 @@
         _virtualLength = 10;   //to stop the snake length virtually at 10 when it goes past it.
     }
 }
-
-void SnakevsBlock::ImplementSnakeBlockSidesCollision(int i) //i is the index of the snake beed and checks for all possible collisions with the snake respective to it's length.
+//Implements both SnakeBlockSides and SnakeBarrier Collisions.
+void SnakevsBlock::ImplementBarrierCollision(int i) //i is the index of the snake beed and checks for all possible collisions with the snake respective to it's length.
 {
     //code makes sure that the colliding part doesn't move in x axis.
     for(int snake_beed_num=0; snake_beed_num<=10; snake_beed_num++)  {