Full grid is now drawn

1 files changed, 22 insertions, 14 deletions

diff --git a/kurator/src/Grid.cpp b/kurator/src/Grid.cpp
index 4243bc9..633b906 100644
--- a/kurator/src/Grid.cpp
+++ b/kurator/src/Grid.cpp
@@ -1,5 +1,7 @@
 #include "Grid.h"
 
+#include <cmath>
+
 #include <raylib.h>
 
 #include <kurator/engine/Camera.h>
@@ -9,23 +11,29 @@ namespace kurator
 {
 
 
+constexpr Color GRID {0x11, 0x11, 0x11, 0xff};
+constexpr Color CENTER {0x31, 0x31, 0x31, 0xff};
+
+
 void
 Grid::draw(const engine::Camera& camera) const
 {
-	const int width = GetScreenWidth();
-	const int height = GetScreenHeight();
-	DrawLine(
-		width/2 - camera.offset.x*camera.scale,
-		0,
-		width/2 - camera.offset.x*camera.scale,
-		height,
-		DARKGRAY);
-	DrawLine(
-		0,
-		height/2 - camera.offset.y*camera.scale,
-		width,
-		height/2 - camera.offset.y*camera.scale,
-		DARKGRAY);
+	constexpr double step = 1000.0;
+	auto start = camera.top_left();
+	start.x = std::round(start.x / step) * step;
+	start.y = std::round(start.y / step) * step;
+	const auto end = camera.bottom_right();
+	auto point = start;
+	while (point.x < end.x || point.y < end.y) {
+		const auto projected = camera.to_screen(point);
+		DrawLine(projected.x, 0, projected.x, GetScreenHeight(), GRID);
+		DrawLine(0, projected.y, GetScreenWidth(), projected.y, GRID);
+		point.x += step;
+		point.y += step;
+	}
+	const auto center = camera.to_screen({0.0, 0.0});
+	DrawLine(center.x, 0, center.x, GetScreenHeight(), CENTER);
+	DrawLine(0, center.y, GetScreenWidth(), center.y, CENTER);
 }