From 864c34cd58c91c7ef054591dec173d7d4c5f104a Mon Sep 17 00:00:00 2001
From: pthzwps2n <1572003858@qq.com>
Date: Mon, 4 Jul 2022 15:51:54 +0800
Subject: [PATCH] =?UTF-8?q?Flappy=20Bird=E6=B8=B8=E6=88=8F?=
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---
 flappybird.c | 178 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100644 flappybird.c

diff --git a/flappybird.c b/flappybird.c
new file mode 100644
index 0000000..f26e73c
--- /dev/null
+++ b/flappybird.c
@@ -0,0 +1,178 @@
+#define __LIBRARY__
+#include<stdio.h>
+#include<unistd.h>
+#include<all.h>
+
+#define BIRD_X 120
+#define BIRD_Y 100
+#define BIRD_WIDTH 10
+#define BIRD_HEIGHT 8
+
+#define MAX_BARRIER 20
+
+#define CLOCK_TRIGGER 20
+#define DROP_PER_TRIGGER 1
+#define UP_PER_CLICK 10
+#define LEFT_PER_TRIGGER 1
+
+#define BIRD_COLOR 12
+#define BARRIER_COLOR 12
+#define BACKGROUND_COLOR 3
+#define GAME_OVER_COLOR 12
+
+#define VAG_WIDTH 320
+#define VGA_HEIGHT 200
+
+#define BARRIER_WIDTH 10
+#define BARRIER_INTERVAL 20
+#define BARRIER_HEIGHT (rand()%(VGA_HEIGHT*3/4))
+
+
+_syscall0(int,init_graphics)
+_syscall1(int,get_message,struct message * ,msg)
+_syscall1(int,repaint,struct pho *,pho)
+_syscall2(int,timercreate,long,ms,int,type)
+
+int fron, rear;
+struct pho barrier[MAX_BARRIER];
+int i;
+struct message msg;
+struct pho obj;
+struct pho background0,gameover;
+struct pho bird;
+
+
+int init_all()
+{
+	bird.x = BIRD_X;
+    bird.y = BIRD_Y;
+    bird.dx = BIRD_WIDTH;
+    bird.dy = BIRD_HEIGHT;
+	bird.color = BIRD_COLOR;
+
+	fron = rear = 0;
+
+	background0.color = BACKGROUND_COLOR;
+    background0.x = 0;
+    background0.y = 0;
+    background0.dx = VAG_WIDTH;
+    background0.dy = VGA_HEIGHT;
+
+	gameover.color = GAME_OVER_COLOR;
+    gameover.x = 0;
+    gameover.y = 0;
+    gameover.dx = VAG_WIDTH;
+    gameover.dy = VGA_HEIGHT;
+	return 0;
+}
+
+
+/*paint*/
+int paint_barrier(void) /*paint barrier*/
+{
+    int i;
+    struct pho rect;
+    for (i = fron; i != rear; i = (i+1)%MAX_BARRIER) {
+        rect.color = BARRIER_COLOR;
+        rect.x = barrier[i].x;
+        rect.y = barrier[i].y;
+        rect.dx = barrier[i].dx;
+        rect.dy = barrier[i].dy;
+        if (repaint(&rect) < 0)
+            return -1;
+    }
+    return 0;
+}
+int paint_all()/*all*/
+{
+	if (repaint(&background0) < 0)
+        return -1;
+    if (repaint(&bird) < 0)
+        return -1;
+    if (paint_barrier() < 0)
+        return -1;
+    return 0;
+}
+
+int push_obj(struct pho * obj) {
+    if (rear != (fron + MAX_BARRIER - 1) % MAX_BARRIER) {
+        barrier[rear].x = obj->x;
+        barrier[rear].y = obj->y;
+        barrier[rear].dx = obj->dx;
+        barrier[rear].dy = obj->dy;
+        rear = (rear + 1) % MAX_BARRIER;
+        return 0;
+    }
+    return -1;
+}
+
+int pop_obj(struct pho * obj) {
+    if (rear == fron)
+        return -1;
+    if (obj != NULL) {
+        obj->x = barrier[fron].x;
+        obj->y = barrier[fron].y;
+        obj->dx = barrier[fron].dx;
+        obj->dy = barrier[fron].dy;
+    }
+    fron = (fron + 1) % MAX_BARRIER;
+    return 0;
+}
+
+
+
+int main()
+{
+	timercreate(CLOCK_TRIGGER, TYPE_USER_TIMER_INFTY); /* create time */
+    init_graphics(); /*Graphical interface*/
+	
+	if(init_all()!=0)/*initialize*/
+	{/*printf("bird error 1\n");*/return -1;}
+	while(1)
+	{	/*sleep(1);*/
+		get_message(&msg);
+		if(msg.mid<0)
+			continue;
+		if(msg.mid==MSG_MOUSE_LEFT_DOWN)
+		{bird.y -= UP_PER_CLICK;}
+		else
+		{bird.y += DROP_PER_TRIGGER;}
+		if(paint_all() != 0)
+		{/*printf("bird error 2\n");*/return -1;}
+		for (i = fron; i != rear; i = (i+1)%MAX_BARRIER) /*Determine if the game has failed*/
+                if (barrier[i].x < bird.x+bird.dx && bird.x < barrier[i].x+barrier[i].dx)
+                    if (barrier[i].y < bird.y+bird.dy && bird.y < barrier[i].y+barrier[i].dy)
+                        {
+							repaint(&gameover);
+							return 0;
+						}
+            for (i = fron; i != rear; i = (i+1)%MAX_BARRIER) /* bird is stationary ,need barriers move*/
+                barrier[i].x -= LEFT_PER_TRIGGER;
+            if (fron == rear) /* there is no barriers,add barriers */
+			{ 
+                obj.dx = BARRIER_WIDTH;
+                obj.dy = BARRIER_HEIGHT;
+                obj.x = VAG_WIDTH;
+                obj.y = 0;
+                push_obj(&obj);
+            }
+            else /* add new barriers,delete old barriers */
+			{ 
+                if (barrier[(rear+MAX_BARRIER-1)%MAX_BARRIER].x+barrier[(rear+MAX_BARRIER-1)%MAX_BARRIER].dx+BARRIER_INTERVAL <= VAG_WIDTH) {
+                    obj.dx = BARRIER_WIDTH;
+                    obj.dy = BARRIER_HEIGHT;
+                    obj.x = VAG_WIDTH;
+                    if (barrier[(rear+MAX_BARRIER-1)%MAX_BARRIER].y)
+                        obj.y = 0;
+                    else
+                        obj.y = VGA_HEIGHT - obj.dy;
+                    push_obj(&obj);
+                }
+                if (barrier[fron].x+barrier[fron].dx <= 0)
+                    pop_obj(NULL);
+            }
+	}
+repaint(&gameover);
+return 0;
+}
+