Diff: draw.cpp

Revision:

17:a0b884f78802

Parent:

15:92cfae44483c

Child:

18:08bd68471535

--- a/draw.cpp	Thu Oct 12 01:30:06 2017 +0000
+++ b/draw.cpp	Thu Oct 19 23:38:01 2017 +0000
@@ -80,16 +80,52 @@
 
 void line_n(float xi, float yi, float xf,  float yf)
 { 
-    float xp; float yp;
-    float m= (yf-yi)/(xf-xi);
-    float b=yf-m*xf;
-    
-    for (xp =xi;xp<=xf;xp+=RSTEP)
+  float xp; float yp;
+    float m;  float b;
+    int  st=1 ;
+    int run=1;
+    m=(float)(yf-yi)/(xf-xi);
+                
+    if (abs(m)<=1){    
+        b=(float)yf-(float)(m*xf);
+  //      command.printf(" m =  %f b= %f \n", m,b);
+        xp =xi;
+        while(run)
         {
-         yp =m*xp+b;
-         vertex2d(xp,yp);
+            yp =m*xp+b;
+            vertex2d(xp ,yp);
+            //print_bin2hex(xp);  print_bin2hex(yp);  
+            //command.printf(" \n");
+            if (xf>xi){ 
+                xp=xp+st;
+                if (xp>xf)run=0;
+            }else {
+                xp-=st;   
+                if (xp<xf)run=0;
+            }
+        
         }
- 
+    }else{ 
+        m=(float)(xf-xi)/(yf-yi);
+        b=(float)xf-(float)(m*yf);
+  //      command.printf(" m =  %f b= %f \n", m,b);
+        yp =yi;
+        while(run)
+        {
+            xp =m*yp+b;
+            vertex2d(xp ,yp);
+         //   print_bin2hex(xp);  print_bin2hex(yp);  
+         //  command.printf(" \n");
+            if (yf>yi){ 
+                yp=yp+st;
+                if (yp>yf)run=0;
+            }else {
+                yp-=st;   
+                if (yp<yf)run=0;
+            }
+        
+        }
+    }
 }
 void line(float xi, float yi, float xf,  float yf)
 {   
@@ -117,7 +153,7 @@
 void circle(float x, float y, float radio)
 {
  initdraw(x+radio,y);
- // coloque codigo aca 
+ // coloque codigo 
  nodraw();
 
 }
\ No newline at end of file