fixed flickering while walking

sort of. the (intentional) dust flicker is still there. might want to remove the player trailing dust as they walk.

1 files changed, 17 insertions, 6 deletions

@@ -251,9 +251,20 @@ void Renderer::renderGame(
 
         int posToUseX = x - leftmost;
         int posToUseY = y - topmost;
+        int xInterp = 0;
+        int yInterp = 0;
         if (game.map.at(x,y).lightType == Source::Player && game.moving) {
-          posToUseX = game.moveProgress.getProgress((game.player_oldx) - leftmost, posToUseX);
-          posToUseY = game.moveProgress.getProgress((game.player_oldy) - topmost, posToUseY);
+          if (game.player_x > game.player_oldx) {
+            xInterp = game.moveProgress.getProgress(-TILE_WIDTH, 0);
+          } else if (game.player_x < game.player_oldx) {
+            xInterp = game.moveProgress.getProgress(TILE_WIDTH, 0);
+          }
+
+          if (game.player_y > game.player_oldy) {
+            yInterp = game.moveProgress.getProgress(-TILE_HEIGHT, 0);
+          } else if (game.player_y < game.player_oldy) {
+            yInterp = game.moveProgress.getProgress(TILE_HEIGHT, 0);
+          }
         }
 
         int fadeX = posToUseX - game.map.at(x,y).lightRadius;
@@ -262,8 +273,8 @@ void Renderer::renderGame(
         int fadeBottom = posToUseY + game.map.at(x,y).lightRadius;
 
         SDL_Rect fadeRect {
-          fadeX * TILE_WIDTH,
-          fadeY * TILE_HEIGHT,
+          fadeX * TILE_WIDTH + xInterp,
+          fadeY * TILE_HEIGHT + yInterp,
           (game.map.at(x,y).lightRadius * 2 + 1) * TILE_WIDTH,
           (game.map.at(x,y).lightRadius * 2 + 1) * TILE_HEIGHT};
 
@@ -288,8 +299,8 @@ void Renderer::renderGame(
             if (!game.map.at(x,y).litTiles.count({sx, sy}))
             {
               SDL_Rect rect {
-                (sx - leftmost) * TILE_WIDTH,
-                (sy - topmost) * TILE_HEIGHT,
+                (sx - leftmost) * TILE_WIDTH + xInterp,
+                (sy - topmost) * TILE_HEIGHT + yInterp,
                 TILE_WIDTH,
                 TILE_HEIGHT};