From cd91a87b765364afd543dc8de8ccb1d4f8fe41a1 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Sun, 08 Aug 2021 04:04:32 -0400
Subject: player: Add eyes (WIP)

---
(limited to 'src/player.c')

diff --git a/src/player.c b/src/player.c
index f5d8f4c..1ec7795 100644
--- a/src/player.c
+++ b/src/player.c
@@ -184,6 +184,7 @@ mf_player_render(struct mf_player *p, SDL_Renderer *renderer)
 	int oy;
 	int fr;
 	int hy;
+	int ox;
 
 	cx = p->cur_x * p->cell_width + p->cell_width / 2;
 	cy = p->cur_y * p->cell_width + p->cell_width / 2;
@@ -275,6 +276,65 @@ mf_player_render(struct mf_player *p, SDL_Renderer *renderer)
 
 #undef _mf_player_px
 
+	/*
+	 * Eyes
+	 */
+
+	if (SDL_SetRenderDrawColor(renderer,
+				MF_COLOR_PEYE_R, MF_COLOR_PEYE_G,
+				MF_COLOR_PEYE_B, MF_COLOR_PEYE_A) < 0) {
+		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+				"Couldn't render player: %s",
+				SDL_GetError());
+		e = -1;
+	}
+
+	ox = r * MF_PLAYER_EYE_X;
+	oy = r * MF_PLAYER_EYE_Y;
+	fr = r * MF_PLAYER_EYE_R;
+
+#define _mf_player_px(X, Y) \
+	do { \
+		hy = round(sqrt((r-0.5)*(r-0.5) - \
+					(X+fx-ox-0.5)*(X+fx-ox-0.5)) + 0.5); \
+		if (Y - oy >= 0-hy || Y - oy <= hy) { \
+			if (SDL_RenderDrawPoint(renderer, \
+						cx + fx - ox + X, cy - oy + Y) \
+					< 0) { \
+				SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, \
+						"Couldn't render widget: %s", \
+						SDL_GetError()); \
+				e = -1; \
+			} \
+		} \
+		hy = round(sqrt((r-0.5)*(r-0.5) - \
+					(X+fx+ox-0.5)*(X+fx+ox-0.5)) + 0.5); \
+		if (Y - oy >= 0-hy || Y - oy <= hy) { \
+			if (SDL_RenderDrawPoint(renderer, \
+						cx + fx + ox + X, cy - oy + Y) \
+					< 0) { \
+				SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, \
+						"Couldn't render widget: %s", \
+						SDL_GetError()); \
+				e = -1; \
+			} \
+		} \
+	} while (0)
+
+	for (x = 0, y = fr; y > x; ++x) {
+		y = round(sqrt((fr-0.5)*(fr-0.5) - (x-0.5)*(x-0.5)) + 0.5);
+		for (i = 0; i <=   y; ++i) _mf_player_px(  x,   i);
+		for (i = 0; i >= 0-y; --i) _mf_player_px(  x,   i);
+		for (i = 0; i <=   y; ++i) _mf_player_px(0-x,   i);
+		for (i = 0; i >= 0-y; --i) _mf_player_px(0-x,   i);
+		for (i = 0; i <=   y; ++i) _mf_player_px(  i,   x);
+		for (i = 0; i <=   y; ++i) _mf_player_px(  i, 0-x);
+		for (i = 0; i >= 0-y; --i) _mf_player_px(  i,   x);
+		for (i = 0; i >= 0-y; --i) _mf_player_px(  i, 0-x);
+	}
+
+#undef _mf_player_px
+
 	return e;
 }
 
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