Revision 8:5a0d849087f5, committed 2017-12-06

Comitter:

spinal

Date:

Wed Dec 06 11:17:25 2017 +0000

Parent:

7:c51ef06c4585

Commit message:

A Simple snow animation, converted from C64 BASIC

Changed in this revision

--- a/My_settings.h	Sun Oct 22 19:13:22 2017 +0000
+++ b/My_settings.h	Wed Dec 06 11:17:25 2017 +0000
@@ -12,5 +12,5 @@
 
 */
 
-#define PROJ_HIRES 1
+#define PROJ_HIRES 0
 #define PROJ_ENABLE_SOUND 0
\ No newline at end of file

--- a/main.cpp	Sun Oct 22 19:13:22 2017 +0000
+++ b/main.cpp	Wed Dec 06 11:17:25 2017 +0000
@@ -2,11 +2,138 @@
 
 Pokitto::Core mygame;
 
+
+// snow flake data
+const byte PROGMEM frames[60]={
+4,8,12,16,12,8,4,0,
+24,20,24,28,32,36,32,28,
+56,52,48,44,40,44,48,52,
+44,48,52,56,52,48,44,40,
+64,68,72,76,80,76,72,68,
+64,60,76,80,76,72,68,64,
+60,64,68,72,96,100,96,92,
+88,84,88,92};
+const byte PROGMEM flkimage[104] ={
+192,224,96,0,0,96,112,48,
+0,0,60,24,0,6,14,12,
+3,7,6,0,128,192,64,0,
+0,64,96,32,0,0,24,24,
+0,2,6,4,1,3,2,0,
+192,128,0,0,0,192,64,0,
+0,0,48,0,0,12,8,0,
+12,4,0,0,128,128,0,0,
+0,128,64,0,0,0,96,0,
+0,0,48,0,0,16,32,0,
+16,16,0,0,128,0,0,0,
+0,128,0,0,0,0,64,0,
+0,32,0,0,32,0,0,0,
+};
+int offset[18]={
+1,0,8,3,3,6,6,6,
+6,6,5,5,5,4,0,0,
+1,3};
+unsigned char mx[18]={
+7,7,9,7,7,9,7,7,
+9,7,7,9,7,9,7,7,
+7,7};
+unsigned char fptrs[18]={
+8,16,32,52,24,42,16,8,
+42,24,52,32,16,32,8,8,
+0,0};
+unsigned char vert[18]={
+168,24,144,160,16,88,128,120,
+40,8,56,176,104,56,80,152,
+152,96};
+unsigned char countdn[18]={
+0,5,1,5,2,2,4,3,
+2,1,6,5,5,3,2,2,
+1,0};
+unsigned char spead[18]={
+4,4,4,4,4,4,4,5,
+5,5,5,5,5,3,3,3,
+2,1};
+unsigned char tempimg[72]={
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0}; 
+
+int numCols = mygame.display.width/8;
+int maxHeight = mygame.display.height;
+
+unsigned char rowStart[27]; // max width in 8x8 tiles
+unsigned char snowRow[176]; // max height
+
+void updateSnow(){
+// Main snow-feild code
+//unsigned char ctr=0;
+unsigned char stp = 1;
+for(int loop=17; loop>stp+7; loop-=stp){ // 17
+countdn[loop]--;
+if(countdn[loop]==0){
+    countdn[loop]=spead[loop];
+    //remove old flake image
+    int y = vert[loop];
+    int a=0;
+    for(a=0; a<4; a++){
+        snowRow[y] &= (255-tempimg[loop*4+a]);
+        y++; if(y>=maxHeight){y=0;} // was 176
+    }//a
+
+    // rem calculate new vertical position
+    // rem (vert) & frame number (offset)
+    vert[loop]++;
+    if(vert[loop]>=maxHeight){vert[loop]=0;}
+    offset[loop]--;
+    if(offset[loop]<0){offset[loop]=mx[loop];}
+        // rem get next frame of animation
+        y=pgm_read_byte(&frames[fptrs[loop]+offset[loop]]);
+        for(a=0; a<4; a++){
+          tempimg[loop*4+a]=pgm_read_byte(&flkimage[y+a]);
+        }
+        // rem add new frame at new position
+    y=vert[loop];
+    for(a=0; a<4; a++){
+      snowRow[y] |= tempimg[loop*4+a];
+      y++; if(y>=maxHeight){y=0;}
+    }
+    
+  } // countdn
+   }// loop   
+  for(char x=0; x<numCols; x++){
+    for(char y=0; y<maxHeight; y++){
+      char p = rowStart[x]+y;
+      if(p>=maxHeight){p-=maxHeight;}
+      for(char t=0; t<7; t++){
+        char col = 0;
+        if(snowRow[p] & (1<<t)) col=1;
+        mygame.display.drawPixel(t+(x*8),y,col);
+      }
+    }
+  }
+}
+
+
 int main () {
+    
+    for(char t=0; t<18; t++){
+        vert[t]=random(maxHeight>>1);
+        if(t%1==0){vert[t]<<=1;}
+    }
+    for(char t=0; t<numCols; t++){
+        rowStart[t]=(random(maxHeight>>1));
+        if(t%1==0){rowStart[t]<<=1;}
+    }    
+    
     mygame.begin();
     while (mygame.isRunning()) {
-        if (mygame.update()) {            
-            mygame.display.print("Hello World!");
+        if (mygame.update()) {
+            updateSnow();
             } 
         }