From f62b5f5c02ec280c038b7e40b9e106a743c8b3f1 Mon Sep 17 00:00:00 2001
From: Sebastian Steuer <iggy@zxzy.de>
Date: Wed, 15 Jun 2011 03:03:52 +0200
Subject: [PATCH] invaders basics

---
 modules/mandelbrot.c    |   4 +-
 modules/spaceinvaders.c | 142 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 144 insertions(+), 2 deletions(-)
 create mode 100644 modules/spaceinvaders.c

diff --git a/modules/mandelbrot.c b/modules/mandelbrot.c
index 6e6d9a7..2fa83fc 100644
--- a/modules/mandelbrot.c
+++ b/modules/mandelbrot.c
@@ -57,7 +57,7 @@ void module_mandelbrot(void) {
     double zoom = 1;
     int iteration_max = 300;
     int x_center = 45;
-    int y_center= 40;
+    int y_center= 20;
     while (1) {
         checkISP();
         lcdDisplay(0);
@@ -148,7 +148,7 @@ void module_mandelbrot(void) {
         //rmin*=zoom;
         //rmax*=zoom;
         
-        zoom *= 0.995;
+        zoom *= 0.996;
         iteration_max = iteration_max*1.02;
         
         x_center = RESX/2;
diff --git a/modules/spaceinvaders.c b/modules/spaceinvaders.c
new file mode 100644
index 0000000..5be2525
--- /dev/null
+++ b/modules/spaceinvaders.c
@@ -0,0 +1,142 @@
+#include <sysinit.h>
+
+#include "basic/basic.h"
+
+#include "lcd/render.h"
+#include "lcd/display.h"
+#include "lcd/allfonts.h"
+
+void ReinvokeISP(void);
+void EnableWatchdog(uint32_t ms);
+void delayms(uint32_t ms);
+
+/**************************************************************************/
+#define POS_PLAYER_Y 59
+#define ENEMY_ROWS 3
+#define ENEMY_COLUMNS 6
+#define DISABLED 255
+
+struct gamestate {
+    int player;
+    int shot_x, shot_y;
+    int enemy_x[ENEMY_ROWS][ENEMY_COLUMNS];
+    int enemy_row_y[ENEMY_ROWS];
+    
+} game = {RESX/2-4, DISABLED, 0};
+char key;
+
+
+void checkISP(void) {
+    if(gpioGetValue(RB_BTN2)==0){
+        gpioSetValue (RB_LED1, CFG_LED_ON); 
+        delayms(200);
+        gpioSetValue (RB_LED1, CFG_LED_OFF); 
+        while(gpioGetValue(RB_BTN0)==0);
+        EnableWatchdog(1000*5);
+        ReinvokeISP();
+    }
+}
+
+void init_enemy() {
+    for (int row = 0; row<ENEMY_ROWS; row++) {
+        game.enemy_row_y[row] = 10 + (40/ENEMY_ROWS)*row;
+        for (int col = 0; col<ENEMY_COLUMNS; col++) {
+            game.enemy_x[row][col] = 5+(86/ENEMY_COLUMNS)*col;
+        }
+    }
+}
+
+void move_shot() {
+    //No shot, do nothing
+    if(game.shot_x == DISABLED) {
+        return;
+    }
+    
+    //moving out of top, end shot
+    if (game.shot_y <= 0) {
+            game.shot_x = DISABLED;
+            return;
+    } 
+    
+    //check for collision with enemy, kill enemy if
+    for (int row=0; row<ENEMY_ROWS; row++) {
+        if (game.enemy_row_y[row] >= game.shot_y && game.enemy_row_y[row] < game.shot_y+8) {
+            for(int col = 0; col<ENEMY_COLUMNS; col++) {
+                if(game.shot_x >= game.enemy_x[row][col] && game.shot_x < game.enemy_x[row][col]+8) {
+                    game.enemy_x[row][col]=DISABLED;
+                    game.shot_x = DISABLED;
+                }
+            }
+        }
+    }
+    
+    game.shot_y -= 3;
+}
+
+void move_player() {
+    if(gpioGetValue(RB_BTN0)==0 && game.player >= 0 ){
+        game.player-=2;
+    }
+    
+    if(gpioGetValue(RB_BTN1)==0 && game.player < RESX-8){
+        game.player+=2;
+    }
+    
+     if(gpioGetValue(RB_BTN4)==0 && game.shot_x == 255){
+        game.shot_x = game.player+4;
+        game.shot_y = POS_PLAYER_Y;
+    }
+}
+
+void draw_player() {
+    //draw_sprite(50, 20);
+    draw_sprite(game.player, POS_PLAYER_Y);
+}
+
+void draw_enemy() {
+    for (int row = 0; row<ENEMY_ROWS; row++) {
+        for (int col = 0; col<ENEMY_COLUMNS; col++) {
+            if (game.enemy_x[row][col] != DISABLED) {
+                draw_sprite(game.enemy_x[row][col],game.enemy_row_y[row]);
+            }
+        }
+    }
+}
+    
+void draw_shot() {
+    if (game.shot_x != 255) {
+        for (int length=0; length<=5; length++) {
+            lcdSetPixel(game.shot_x, game.shot_y+length, true);
+        }
+    }
+}
+    
+
+void draw_sprite(int x, int y) {
+    for (int dx=0; dx<8; dx++){
+        for(int dy=0; dy<8; dy++){
+            lcdSetPixel(x+dx,y+dy, true);
+        }
+    }
+}
+
+void module_spaceinvaders(void) {
+    gpioSetValue (RB_LED1, CFG_LED_OFF); 
+    backlightInit();
+    
+    init_enemy();
+    
+    while (1) {
+        checkISP();
+        lcdFill(0);
+        
+        move_shot();
+        move_player();
+        draw_player();
+        draw_enemy();
+        draw_shot();
+        lcdDisplay(0);
+        delayms(10);
+    }
+    return;
+}
\ No newline at end of file