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PO2D 45 degree angled Sloped tiles
 

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    <p>Here is my code that checks the type of tile. If its an inclined tile it then updates the position of the character. As demonstrated in the photo my character does not move along the slope. What am I doing wrong?</p> <pre><code>bool Entity::PosValidTile(Tile* Tile, int tileX, int tileY) { if(Tile-&gt;TypeID == TILE_TYPE_ANGLEUP) { int Slope, Intercept; int newY; Vector P1,P2; P1.X = tileX; P1.Y = tileY + TILE_SIZE; P2.X = tileX + TILE_SIZE; P2.Y = tileY; if(X + (Width/2) &gt; tileX) { Slope = -(P2.Y- P1.Y) / (P2.X - P1.X); Intercept = Slope * (-P1.X + P1.Y); newY = Slope * ((X + Width/2) + Intercept); Y = (newY - Height); return true; } } } </code></pre> <p><img src="https://i.stack.imgur.com/8Y145.png" alt="demonstration"></p> <p>The dimensions of the character are 48 X 96; which are Width and Height respectively. His origin like the tile, is at the upper left corner.</p> <p>Here is how that function is used</p> <pre><code>bool Entity::PosValid(int NewX, int NewY) { bool Return = true; int StartX = (NewX + Col_X) / TILE_SIZE; int StartY = (NewY + Col_Y) / TILE_SIZE; int EndX = ((NewX + Col_X) + Width - Col_Width - 1) / TILE_SIZE; int EndY = ((NewY + Col_Y) + Height - Col_Height - 1) / TILE_SIZE; if(Flags &amp; ENTITY_FLAG_IGNOREMAP) { }else { for(int iY = StartY; iY &lt;= EndY;iY++) { for(int iX = StartX;iX &lt;= EndX;iX++) { Tile* Tile = Area::AreaControl.GetTile(iX * TILE_SIZE, iY * TILE_SIZE); int atileY = iY * TILE_SIZE; int atileX = iX * TILE_SIZE; if(PosValidTile(Tile,atileX,atileY) == false) { Return = false; } } } } if(Flags &amp; ENTITY_FLAG_MAPONLY) { }else { for(int i = 0;i &lt; (int)EntityList.size();i++) { if(PosValidEntity(EntityList[i], NewX, NewY) == false) { Return = false; } } } return Return; } </code></pre> <p>The function that calls the previous one is my OnMove function.</p> <pre><code>void Entity::OnMove(float MoveX, float MoveY) { if(MoveX == 0 &amp;&amp; MoveY == 0) return; double NewX = 0; double NewY = 0; CanJump = false; MoveX *= Time::TimeControl.GetDeltaTime(); MoveY *= Time::TimeControl.GetDeltaTime(); if(MoveX != 0) { if(MoveX &gt;= 0) NewX = Time::TimeControl.GetDeltaTime(); else NewX = -Time::TimeControl.GetDeltaTime(); } if(MoveY != 0) { if(MoveY &gt;= 0) NewY = Time::TimeControl.GetDeltaTime(); else NewY = -Time::TimeControl.GetDeltaTime(); } while(true) { if(Flags &amp; ENTITY_FLAG_GHOST) { PosValid((float)(X + NewX), (float)(Y + NewY)); X += (float)NewX; Y += (float)NewY; }else { if(PosValid((float)(X + NewX), (int)(Y))) { X += (float)NewX; }else { SpeedX = 0; } if(PosValid((float)(X), (float)(Y + NewY))) { Y += (float)NewY; }else { if(MoveY &gt; 0) { CanJump = true; } SpeedY = 0; } } MoveX += (float)-NewX; MoveY += (float)-NewY; if(NewX &gt; 0 &amp;&amp; MoveX &lt;= 0) NewX = 0; if(NewX &lt; 0 &amp;&amp; MoveX &gt;= 0) NewX = 0; if(NewY &gt; 0 &amp;&amp; MoveY &lt;= 0) NewY = 0; if(NewY &lt; 0 &amp;&amp; MoveY &gt;= 0) NewY = 0; if(MoveX == 0) NewX = 0; if(MoveY == 0) NewY = 0; if(MoveX == 0 &amp;&amp; MoveY == 0) break; if(NewX == 0 &amp;&amp; NewY == 0) break; } } </code></pre> <p>This function is then called in the main Loop Like so OnMove(SpeedX,SpeedY); The speeds are calculated as fallows</p> <pre><code> SpeedX += AccelX * Time::TimeControl.GetDeltaTime(); SpeedY += AccelY * Time::TimeControl.GetDeltaTime(); </code></pre>
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    1. COYou should add some `return false` in your function. All execution paths should return something.
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