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Add Javascript version
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Michaelangel007
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72
README.md
72
README.md
@ -2,6 +2,8 @@
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## Applesoft
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```Basic
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0 REM Converted from ATARI "Hat"
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1 REM By Michaelangel007
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@ -15,9 +17,9 @@
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9 REM ZS -> S
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10 REM 2.25 * 2.25 -> 5.0625
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100 REM ARCHIMEDES SPIRAL
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110 REM
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110 REM
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120 REM ANALOG MAGAZINE
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130 REM
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130 REM
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140 HGR:POKE 49234,0:REM $C052
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150 F=4.71238905/144
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160 FOR Z=-64 TO 64
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@ -33,3 +35,69 @@
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240 HCOLOR=0:HPLOT X,Y+1 TO X,191
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250 NEXT:NEXT
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```
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### Javascript
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* [Javascript (HTML Preview](http://htmlpreview.github.io/?https://raw.githubusercontent.com/Michaelangel007/appl2_hat3d/js/hat3d.html)
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* [Javascript (Raw Git Preview](https://cdn.rawgit.com/Michaelangel007/apple2_hat3d/js/hat3d.html)
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```Javascript
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function hat( color, isSolid )
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{
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var f = 4.71238905 / 144;
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var i, z;
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var s, h;
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var u, v;
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var x, y;
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var clear = [255-color[0], 255-color[1], 255-color[2], 255];
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for( z = -64; z <= 64; z++ )
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{
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s = z*z*5.0625;
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h = (Math.sqrt( 20736-s ) + 0.5) | 0;
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for( i = -h; i <= h; i += 1 )
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{
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u = Math.sqrt( i*i + s ) * f;
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v = (Math.sin( u ) + Math.sin( u*3 ) * 0.4) * 56;
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x = i + z + 160;
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y = 90 - v + z;
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if ((x < canvas_w) && (y < canvas_h))
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putpixel( x|0, y|0, color )
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if( isSolid )
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canvas_vline( x|0, y+1|0, undefined, clear );
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}
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}
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}
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```
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## Original Atari BASIC
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```
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Original Atari Basic Source
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100 REM ARCHIMEDES SPIRAL
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110 REM
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120 REM ANALOG MAGAZINE
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130 REM
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140 GRAPHICS 8+16:SETCOLOR 2,0,0
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150 XP=144:XR=4.71238905:XF=XR/XP
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160 FOR ZI=-64 TO 64
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170 ZT=ZI*2.25:ZS=ZT*ZT
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180 XL=INT(SQR(20736-ZS)+0.5)
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190 FOR XI=0-XL TO XL
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200 XT=SQR(XI*XI+ZS)*XF
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210 YY=(SIN(XT)+SIN(XT*3)*0.4)*56
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220 X1=XI+ZI+160:Y1=90-YY+ZI
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230 TRAP 250:COLOR 1:PLOT X1,Y1
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240 COLOR 0:PLOT X1,Y1+1:DRAWTO X1,191
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250 NEXT XI:NEXT ZI
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260 GOTO 260
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```
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# Original Atari Description
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* http://j-b.livejournal.com/419883.html
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218
js/canvas.js
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218
js/canvas.js
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/*
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* https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Pixel_manipulation_with_canvas
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* http://tutorials.jenkov.com/html5-canvas/pixels.html
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*/
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// Version 2
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// Framebuffer
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var canvas;
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var canvas_context;
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var canvas_image;
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var canvas_data;
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var canvas_w;
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var canvas_h;
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var canvas_sx = 10;
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var canvas_sy = 10;
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// ========================================================================
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function canvas_put()
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{
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canvas_context.putImageData( canvas_image, 0, 0 );
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}
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// ========================================================================
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function canvas_clear()
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{
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canvas_context.clearRect( 0, 0, canvas.width, canvas.height );
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}
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// ========================================================================
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function canvas_get()
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{
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canvas_image = canvas_context.getImageData(0,0,canvas_w,canvas_h);
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canvas_data = canvas_image.data;
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}
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// Pixel
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/**
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* {Number} x
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* {Number} y
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* {Number|Array} r
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* {Number|Undefined} g
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* {Number|Undefined} b
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* {Number|Undefined} a
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* Note:
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* a = 0 transparent
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* a = 255 opaque
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* Example:
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* putpixel( 1, 2, 255, 0, 0, 255 );
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* putpixel( 3, 4, [255, 0, 0, 255] );
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*/
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// ========================================================================
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function putpixel( x, y, r,g,b,a)
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{
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var i = ((y * canvas_image.width) + x) * 4;
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// r is array [r,g,b,a]
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if ((typeof r === 'object') && Array.isArray( r ))
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{
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var t = r;
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r = t[0];
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g = t[1];
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b = t[2];
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a = t[3];
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}
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// else: 'number'
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canvas_data[i+0] = r;
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canvas_data[i+1] = g;
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canvas_data[i+2] = b;
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canvas_data[i+3] = a;
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}
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// ========================================================================
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function addpixel( x, y, r,g,b,a)
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{
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var i = ((y * canvas_image.width) + x) * 4;
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// r is array [r,g,b,a]
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if ((typeof r === 'object') && Array.isArray( r ))
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{
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var t = r;
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r = t[0];
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g = t[1];
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b = t[2];
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a = t[3];
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}
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// else: 'number'
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canvas_data[i+0] += r;
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canvas_data[i+1] += g;
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canvas_data[i+2] += b;
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canvas_data[i+3] += a;
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}
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// ========================================================================
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function subpixel( x, y, r,g,b,a)
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{
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var i = ((y * canvas_image.width) + x) * 4;
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// r is array [r,g,b,a]
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if ((typeof r === 'object') && Array.isArray( r ))
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{
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var t = r;
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r = t[0];
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g = t[1];
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b = t[2];
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a = t[3];
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}
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// else: 'number'
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canvas_data[i+0] -= r;
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canvas_data[i+1] -= g;
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canvas_data[i+2] -= b;
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canvas_data[i+3] -= a;
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}
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// ========================================================================
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function mulpixel( x, y, r,g,b,a)
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{
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// var v = h - y; // put origin at bottom-left instead of top-left
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var i = ((y * canvas_image.width) + x) * 4;
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// r is array [r,g,b,a]
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if ((typeof r === 'object') && Array.isArray( r ))
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{
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var t = r;
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r = t[0];
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g = t[1];
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b = t[2];
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a = t[3];
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}
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// else: 'number'
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canvas_data[i+0] *= r / 255;
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canvas_data[i+1] *= g / 255;
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canvas_data[i+2] *= b / 255;
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canvas_data[i+3] *= a / 255;
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}
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// ========================================================================
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function zoompixel( x, y, op, color )
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{
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var i, j;
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var u = sx-1;
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var v = sy-1;
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for( j = 0; j < v; j++ )
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{
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for( i = 0 ; i < u; i++ )
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{
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op( x*canvas_sx + i + 1, y*canvas_sy + j + 1, color ); // +1,+1 for grid border
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}
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}
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}
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// Primitives
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// ========================================================================
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function canvas_vline( x, y1, y2, color )
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{
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if( y1 === undefined ) y1 = 0;
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if( y2 === undefined ) y2 = canvas_h;
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var y;
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for( y = y1; y < y2; y++ )
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putpixel( x, y, color );
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}
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// ========================================================================
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function canvas_hline( y, x1, x2, color )
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{
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if( x1 === undefined ) x1 = 0;
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if( x2 === undefined ) x2 = canvas_w;
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var x;
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for( x = x1 ; x < x2; x++ )
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putpixel( x, y, color );
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}
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// ========================================================================
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function canvas_grid( color, scale_x, scale_y )
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{
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if (scale_x === undefined) scale_x = 10;
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if (scale_y === undefined) scale_y = 10;
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canvas_sx = scale_x;
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canvas_sy = scale_y;
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var u = canvas_sx-1;
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var v = canvas_sy-1;
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var x,y;
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var w = canvas_w;
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var h = canvas_h;
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for( y = 0; y < h; y += canvas_sy )
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canvas_hline( y, undefined, undefined, color );
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for( x = 0 ; x < w; x += canvas_sx )
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canvas_vline( x, undefined, undefined, color );
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}
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// Init
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// ========================================================================
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function canvas_init( width, height )
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{
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canvas = document.getElementById( 'canvas' );
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if( width === undefined ) width = canvas.width;
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if( height === undefined ) height = canvas.height;
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canvas_context = canvas.getContext( '2d' );
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canvas_image = canvas_context.createImageData( width, height );
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canvas_data = canvas_image.data;
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if( width !== undefined ) canvas.width = width;
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if( height !== undefined ) canvas.height = height;
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canvas_context.canvas.width = width;
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canvas_context.canvas.height = height;
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canvas_w = width;
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canvas_h = height;
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}
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27
js/hat3d.html
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27
js/hat3d.html
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<html>
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<head>
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<script src="canvas.js"></script>
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<script src="hat3d.js" ></script>
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</head>
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<body onload='main();' style='margin:0;'>
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<table cellpadding='0' style='margin:0; border-spacing:0;'>
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<tr>
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<td valign='top'>
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<canvas id='canvas' width=320 height=200 style='margin:0; left:0; top:0'>
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HTML5 Canvas not supported!
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</canvas>
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</td>
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</tr>
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<tr>
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<td>
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<button id="buttonSolid" onclick="onSolid()">Solid </button>
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<button id="buttonFrame" onclick="onFrame()">Wireframe</button>
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</td>
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</tr>
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</table>
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<br>
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<a href="https://github.com/Michaelangel007/apple2_hat3d">https://github.com/Michaelangel007/apple2_hat3d</a>
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</body>
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</html>
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90
js/hat3d.js
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90
js/hat3d.js
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"use strict";
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// Original Atari Basic Source
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/*
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100 REM ARCHIMEDES SPIRAL
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110 REM
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120 REM ANALOG MAGAZINE
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130 REM
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140 GRAPHICS 8+16:SETCOLOR 2,0,0
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150 XP=144:XR=4.71238905:XF=XR/XP
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160 FOR ZI=-64 TO 64
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170 ZT=ZI*2.25:ZS=ZT*ZT
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180 XL=INT(SQR(20736-ZS)+0.5)
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190 FOR XI=0-XL TO XL
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200 XT=SQR(XI*XI+ZS)*XF
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210 YY=(SIN(XT)+SIN(XT*3)*0.4)*56
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220 X1=XI+ZI+160:Y1=90-YY+ZI
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230 TRAP 250:COLOR 1:PLOT X1,Y1
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240 COLOR 0:PLOT X1,Y1+1:DRAWTO X1,191
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250 NEXT XI:NEXT ZI
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260 GOTO 260
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*/
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function hat( color, isSolid )
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{
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var f = 4.71238905 / 144;
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var i, z;
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var s, h;
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var u, v;
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var x, y;
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var clear = [255-color[0], 255-color[1], 255-color[2], 255];
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for( z = -64; z <= 64; z++ )
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{
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s = z*z*5.0625;
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h = (Math.sqrt( 20736-s ) + 0.5) | 0;
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for( i = -h; i <= h; i += 1 )
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{
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u = Math.sqrt( i*i + s ) * f;
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v = (Math.sin( u ) + Math.sin( u*3 ) * 0.4) * 56;
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x = i + z + 160;
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y = 90 - v + z;
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if ((x < canvas_w) && (y < canvas_h))
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putpixel( x|0, y|0, color )
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if( isSolid )
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canvas_vline( x|0, y+1|0, undefined, clear );
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}
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}
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}
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function main()
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{
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document.body.style.overflow = 'hidden';
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canvas_init( 320, 200 );
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canvas_clear();
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onSolid();
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// onFrame();
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}
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function onSolid()
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{
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canvas_get();
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// White on Black
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canvas_grid( [0,0,0,255], 1, 1 );
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hat( [255,255,255,255], 1 );
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// Black on White
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//hat( [0,0,0,255], 1 );
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canvas_put();
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}
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function onFrame()
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{
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canvas_get();
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// White on Black
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canvas_grid( [0,0,0,255], 1, 1 );
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hat( [255,255,255,255], 0 );
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// Black on White
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//hat( [0,0,0,255], 0 );
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canvas_put();
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}
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