From 8c4d5838e67d62775983fb46a64813d8b6bceb28 Mon Sep 17 00:00:00 2001
From: Charlie Stanton <charlie@shtanton.xyz>
Date: Sun, 6 Apr 2025 09:15:32 +0100
Subject: Minor bug fixes

---
 src/all.c  | 40 ++++++++++++++++++++++++++--------------
 src/tick.c | 19 ++++++++++++++-----
 2 files changed, 40 insertions(+), 19 deletions(-)

(limited to 'src')

diff --git a/src/all.c b/src/all.c
index 15f2558..82f1360 100644
--- a/src/all.c
+++ b/src/all.c
@@ -104,34 +104,47 @@ static DrawList *render(State *state, UI *ui, Arena *a) {
 
 	DrawList *drawList = new(a, 1, DrawList);
 
-	int cellWidth = (ui->width - GRID_OFFSET_X) / GRIDWIDTH;
-	int cellHeight = ui->height / GRIDHEIGHT;
+	float cellWidth = (float) (ui->width - GRID_OFFSET_X) / GRIDWIDTH;
+	float cellHeight = (float) ui->height / GRIDHEIGHT;
 
 	for (int x = 0; x < GRIDWIDTH; x++) {
 		for (int y = 0; y < GRIDHEIGHT; y++) {
-			drawList->els[drawList->len++] = (DrawElement) {
-				.x = cellWidth * x + GRID_OFFSET_X,
-				.y = cellHeight * y,
-				.w = cellWidth,
-				.h = cellHeight,
-				.fill = {0, 0, 0, 0},
-				.border = {0, 0, 0, 255},
-			};
 			for (int subx = 0; subx < 2; subx++) {
 				for (int suby = 0; suby < 2; suby++) {
 					drawList->els[drawList->len++] = (DrawElement) {
 						.x = cellWidth * x + GRID_OFFSET_X + subx * cellWidth / 2,
 						.y = cellHeight * y + suby * cellHeight / 2,
-						.w = cellWidth / 2,
-						.h = cellHeight / 2,
+						.w = cellWidth / 2 + (1 - subx),
+						.h = cellHeight / 2 + (1 - suby),
 						.fill = colors[state->grid[x + GRIDWIDTH * y]][subx + 2 * suby],
-						.border = {0, 0, 0, 0},
 					};
 				}
 			}
 		}
 	}
 
+	// Vertical grid lines
+	for (int x = 1; x < GRIDWIDTH; x++) {
+		drawList->els[drawList->len++] = (DrawElement) {
+			.x = cellWidth * x + GRID_OFFSET_X,
+			.y = 0,
+			.w = 1,
+			.h = ui->height,
+			.fill = {0, 0, 0, 255},
+		};
+	}
+
+	// Horizontal grid lines
+	for (int y = 1; y < GRIDHEIGHT; y++) {
+		drawList->els[drawList->len++] = (DrawElement) {
+			.x = GRID_OFFSET_X,
+			.y = y * cellHeight,
+			.w = ui->width - GRID_OFFSET_X,
+			.h = 1,
+			.fill = {0, 0, 0, 255},
+		};
+	}
+
 	drawList->els[drawList->len++] = (DrawElement) {
 		.x = cellWidth * state->goalx + GRID_OFFSET_X,
 		.y = cellHeight * state->goaly,
@@ -139,7 +152,6 @@ static DrawList *render(State *state, UI *ui, Arena *a) {
 		.h = cellHeight,
 		.fill = {255, 0, 0, 63},
 		.border = {255, 0, 0, 255},
-		.image = 1,
 	};
 
 	drawList->els[drawList->len++] = (DrawElement) {
diff --git a/src/tick.c b/src/tick.c
index 4b255df..598087a 100644
--- a/src/tick.c
+++ b/src/tick.c
@@ -302,30 +302,39 @@ static void tick(Game *game, Arena a) {
 					}
 					break;
 				case EMPTY:
-					// TODO: same as multiple reds
+					blues = 0;
 					if (
 						x > 0 &&
 						lastState->grid[x - 1 + y * GRIDWIDTH] == BLUE_RIGHT
 					) {
-						game->state.grid[x + y * GRIDWIDTH] = BLUE_RIGHT;
+						blues++;
+						blue = BLUE_RIGHT;
 					}
 					if (
 						x < GRIDWIDTH - 1 &&
 						lastState->grid[x + 1 + y * GRIDWIDTH] == BLUE_LEFT
 					) {
-						game->state.grid[x + y * GRIDWIDTH] = BLUE_LEFT;
+						blues++;
+						blue = BLUE_LEFT;
 					}
 					if (
 						y > 0 &&
 						lastState->grid[x + (y - 1) * GRIDWIDTH] == BLUE_DOWN
 					) {
-						game->state.grid[x + y * GRIDWIDTH] = BLUE_DOWN;
+						blues++;
+						blue = BLUE_DOWN;
 					}
 					if (
 						y < GRIDHEIGHT - 1 &&
 						lastState->grid[x + (y + 1) * GRIDWIDTH] == BLUE_UP
 					) {
-						game->state.grid[x + y * GRIDWIDTH] = BLUE_UP;
+						blues++;
+						blue = BLUE_UP;
+					}
+					if (blues == 1) {
+						game->state.grid[x + y * GRIDWIDTH] = blue;
+					} else if (blues >= 2) {
+						game->state.grid[x + y * GRIDWIDTH] = BLUE;
 					}
 					break;
 			}
-- 
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