Make mask brush a circle

3 files changed, 12 insertions, 9 deletions

diff --git a/build.sh b/build.sh
index 287fd6c..8bc5d4f 100755
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,4 @@
-flags=-Wall -pedantic -O0 
-gcc $flags -O0 -c main.c -o main.o && \
+flags='-Wall -pedantic -O0'
+gcc $flags -c main.c -o main.o && \
 gcc main.o -lSDL2 -o main && \
 ./main
diff --git a/main.c b/main.c
index 9d53b94..407a1cd 100644
--- a/main.c
+++ b/main.c
@@ -4,9 +4,12 @@
 #include "platform.c"
 
 void PaintMask(float *mask, float x, float y, float color, float size) {
-	for (int j = y - size / 2; j < y + size / 2; j++) {
-		for (int i = x - size / 2; i < x + size / 2; i++) {
-			if (i > 0 && i < WINDOW_W && j > 0 && j < WINDOW_H) {
+	for (int j = y - size; j < y + size; j++) {
+		for (int i = x - size; i < x + size; i++) {
+			float dj = y - j;
+			float di = x - i;
+			if (i > 0 && i < WINDOW_W && j > 0 && j < WINDOW_H
+					&& dj * dj + di * di <= size * size / 2) {
 				size_t index = i + j * WINDOW_W;
 				mask[index] = color;
 			}
@@ -41,7 +44,7 @@ void GameMain() {
 		}
 		int mouse_x, mouse_y;
 		Uint32 mouse_state = SDL_GetMouseState(&mouse_x, &mouse_y);
-		float size = 100;
+		float size = 20;
 		if (mouse_state & SDL_BUTTON_LMASK) {
 			PaintMask(mask, mouse_x, WINDOW_H - mouse_y, 1.0, size);
 		} else if (mouse_state & SDL_BUTTON_RMASK) {
diff --git a/platform.c b/platform.c
index 7ba6d53..24f5394 100644
--- a/platform.c
+++ b/platform.c
@@ -13,7 +13,7 @@ double GetCurrentTimestamp() {
 	return (double) SDL_GetTicks64() / 1000.0;
 }
 
-SDL_Texture *createTiledTexture(SDL_Renderer *context, const char *filename, int width, int height) {
+SDL_Texture *CreateTiledTexture(SDL_Renderer *context, const char *filename, int width, int height) {
 	SDL_Surface *texture_surface = SDL_LoadBMP(filename);
 	SDL_Texture *texture_tile = SDL_CreateTextureFromSurface(context, texture_surface);
 	int tile_w = texture_surface->w;
@@ -48,9 +48,9 @@ void PlatformMain(void (*GameMain)(void)) {
 
 	context = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
 
-	background = createTiledTexture(context, "background.bmp", WINDOW_W, WINDOW_H);
+	background = CreateTiledTexture(context, "background.bmp", WINDOW_W, WINDOW_H);
 
-	foreground = createTiledTexture(context, "foreground.bmp", WINDOW_W, WINDOW_H);
+	foreground = CreateTiledTexture(context, "foreground.bmp", WINDOW_W, WINDOW_H);
 	SDL_SetTextureBlendMode(foreground, SDL_BLENDMODE_MOD);
 
 	terrain = SDL_CreateTexture(context,