From 61c94502bd33f2a38bdae502318c4a766448db60 Mon Sep 17 00:00:00 2001
From: pixel <pixel>
Date: Fri, 28 Mar 2003 16:08:13 +0000
Subject: Circles and funny stuffs

---
 include/shape.h |   4 +++
 lib/shape.cc    | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/test.cc     |   5 ++-
 3 files changed, 108 insertions(+), 1 deletion(-)

diff --git a/include/shape.h b/include/shape.h
index 2c7addf..fdae6af 100644
--- a/include/shape.h
+++ b/include/shape.h
@@ -15,6 +15,10 @@ namespace mogltk {
     class shape : public Base {
       public:
         virtual void pixel(int x, int y, ColorP = WHITE);
+	virtual void circle(int x, int y, int r, ColorP = WHITE);
+	virtual void pcircle(int x, int y, int r, ColorP = WHITE);
+	virtual void arc(int x, int y, int r, double a1, double a2, ColorP = WHITE);
+	virtual void arc(int x, int y, int r, int x1, int y1, int x2, int y2, ColorP = WHITE);
         virtual void box(int x1, int y1, int x2, int y2, ColorP = WHITE);
         virtual void box3d(int x1, int y1, int x2, int y2, ColorP = DOS_WHITE, ColorP = DOS_HIGH_WHITE, ColorP = DOS_GRAY, int = 2, bool = false);
         virtual void obox(int x1, int y1, int x2, int y2, ColorP = WHITE);
diff --git a/lib/shape.cc b/lib/shape.cc
index e586d6d..972600c 100644
--- a/lib/shape.cc
+++ b/lib/shape.cc
@@ -1,3 +1,4 @@
+#include <math.h>
 #include <SDL.h>
 #include "engine.h"
 #include "base.h"
@@ -92,6 +93,105 @@ void mogltk::shape::pixel(int x, int y, ColorP c) {
     LEAVE;
 }
 
+void mogltk::shape::circle(int x0, int y0, int r, ColorP c) {
+    ENTER;
+    
+    int x = 0;
+    int y = r - 1;
+    int d = 3 - 2 * r;
+    int dI = 10 - 4 * r;
+    int rI = 6;
+    
+    while (x <= y) {
+	pixel(x0 + x, y0 + y, c);
+	pixel(x0 - x, y0 + y, c);
+	pixel(x0 + x, y0 - y, c);
+	pixel(x0 - x, y0 - y, c);
+	pixel(x0 + y, y0 + x, c);
+	pixel(x0 - y, y0 + x, c);
+	pixel(x0 + y, y0 - x, c);
+	pixel(x0 - y, y0 - x, c);
+	if (d >= 0) {
+	    d += dI;
+	    dI += 8;
+	    y -= 1;
+	} else {
+	    d += rI;
+	    dI += 4;
+	}
+	rI += 4;
+	x += 1;
+    }
+
+    LEAVE;
+}
+
+void mogltk::shape::pcircle(int x0, int y0, int r, ColorP c) {
+    ENTER;
+    
+    int x = 0;
+    int y = r - 1;
+    int d = 3 - 2 * r;
+    int dI = 10 - 4 * r;
+    int rI = 6;
+    
+    while (x <= y) {
+	hline(x0 - x, x0 + x, y0 + y, c);
+	hline(x0 - x, x0 + x, y0 - y, c);
+	hline(x0 - y, x0 + y, y0 + x, c);
+	hline(x0 - y, x0 + y, y0 - x, c);
+	if (d >= 0) {
+	    d += dI;
+	    dI += 8;
+	    y -= 1;
+	} else {
+	    d += rI;
+	    dI += 4;
+	}
+	rI += 4;
+	x += 1;
+    }
+
+    LEAVE;
+}
+
+void mogltk::shape::arc(int x0, int y0, int r, double a1, double a2, ColorP c) {
+    ENTER;
+    
+    int x = 0;
+    int y = r - 1;
+    int d = 3 - 2 * r;
+    int dI = 10 - 4 * r;
+    int rI = 6;
+    
+    while (x <= y) {
+	pixel(x0 + y, y0 - x, c); // 1
+	pixel(x0 + x, y0 - y, c); // 2
+	pixel(x0 - x, y0 - y, c); // 3
+	pixel(x0 - y, y0 - x, c); // 4
+	pixel(x0 - y, y0 + x, c); // 5
+	pixel(x0 - x, y0 + y, c); // 6
+	pixel(x0 + x, y0 + y, c); // 7
+	pixel(x0 + y, y0 + x, c); // 8
+    
+	if (d >= 0) {
+	    d += dI;
+	    dI += 8;
+	    y -= 1;
+	} else {
+	    d += rI;
+	    dI += 4;
+	}
+	rI += 4;
+	x += 1;
+    }
+
+    LEAVE;
+}
+
+void mogltk::shape::arc(int x0, int y0, int r, int x1, int y1, int x2, int y2, ColorP c) {
+}
+
 void mogltk::shape::obox(int x1, int y1, int x2, int y2, ColorP c) {
     ENTER;
 
diff --git a/src/test.cc b/src/test.cc
index 5bdb0ce..4ba9349 100644
--- a/src/test.cc
+++ b/src/test.cc
@@ -62,8 +62,11 @@ virtual int startup() throw (GeneralException) {
 	sh->window(50, 350, 150, 400, "Titre plus beau ;)");
 	sh->box3d(180, 130, 320, 220);
 	sh->button(200, 150, 300, 200, "Bouton");
+
+	sh->pcircle(320, 240, 50);
+//	sh->arc(320, 240, 50, 0, 0);
 	
-	sh->box(MIN(sx1, sx2), MIN(sy1, sy2), MAX(sx1, sx2), MAX(sy1, sy2), AlphaBlue);
+//	sh->box(MIN(sx1, sx2), MIN(sy1, sy2), MAX(sx1, sx2), MAX(sy1, sy2), AlphaBlue);
 
 	font->putcursor(550, 400);
 	font->printf("FPS: %.2f\n", mogltk::engine::FPS());
-- 
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