January 2007 - Fractdev - mailman.xmission.com

yeah, baby!
by Richard 24 Jan '07

24 Jan '07

<http://www.xmission.com/~legalize/fractals/fractdev/fractint.png> That's what I'm talkin' bout! (I got the on-screen graphics text working.) -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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RE: [Fractdev] GDI output working! True colour?
by Paul 15 Jan '07

15 Jan '07

Hi Richard, Oops, I got a message saying that email was too big. Yes I remember the old true colour mode and it was not much use as it only gave shades of blue as no translation was done to the iteration count. My true colour algorithm creates 3 sinusoidal values for each of the red, green and blue colour streams and makes a true colour palette. All that is required is the starting point in each sine wave and the frequency. I.e., 6 integers specify the true colour palette. These are spread out according to the max iteration count. The only problem is that it is not reversible like the 256 colour map, so a separate matrix of 16 bit integers needs to be kept for the solid guessing etc to work. Image deleted to reduce file size This was the colour control dialogue box. Here is how the palette is generated: WORD RedStartInt, GreenStartInt, BlueStartInt, RedIncInt, GreenIncInt, BlueIncInt; BYTE TRUE_PALETTE[MAXTHRESHOLD * 3]; // for maximum palette /************************************************************************** Initialise True Colour Palette **************************************************************************/ void InitTrueColourPalette(BYTE RandFlag) { long i, cycle, temp; DOUBLE RedStart, GreenStart, BlueStart, RedInc, GreenInc, BlueInc; float size; static WORD Randomise; if (RandFlag) { srand((unsigned)time(NULL) + Randomise);// Seed the random-number generator with current time so // that the numbers will be different every time we run. if (RandomColourFlag) { RedIncInt = rand() / RandomDivisor; GreenIncInt = rand() / RandomDivisor; BlueIncInt = rand() / RandomDivisor; RedStartInt = rand() / RandomDivisor; GreenStartInt = rand() / RandomDivisor; BlueStartInt = rand() / RandomDivisor; } Randomise = rand(); // to prevent the same value within the second!! } RedStart = (float)(RedStartInt) / 100.0; GreenStart = (float)(GreenStartInt) / 100.0; BlueStart = (float)(BlueStartInt) / 100.0; RedInc = (float)(RedIncInt) / 100.0; GreenInc = (float)(GreenIncInt) / 100.0; BlueInc = (float)(BlueIncInt) / 100.0; temp = ((long) StartColourCycling > threshold) ? threshold : StartColourCycling; for (i = 1L; i < threshold; ++i) { cycle = temp + i; if (cycle > threshold) cycle -= threshold; size = (float) cycle / (float) ((logval != 0) ? 256 : threshold); TRUE_PALETTE[i * 3 + 0] = (BYTE)(127.0 * sin(TWO_PI * (size + RedStart) * RedInc)) + 128; TRUE_PALETTE[i * 3 + 1] = (BYTE)(127.0 * sin(TWO_PI * (size + GreenStart) * GreenInc)) + 128; TRUE_PALETTE[i * 3 + 2] = (BYTE)(127.0 * sin(TWO_PI * (size + BlueStart) * BlueInc)) + 128; } *(TRUE_PALETTE + threshold * 3 + 0) = (BYTE)InsideBlue; *(TRUE_PALETTE + threshold * 3 + 1) = (BYTE)InsideGreen; *(TRUE_PALETTE + threshold * 3 + 2) = (BYTE)InsideRed; } Here is the basic plotting routine (cut down for simplicity): Note that BYTE *pixels is the array of rgb triplets for the image to screen and WORD *wpixels is the array of iteration counts (16 bit) /************************************************************************** Get values of r, g, b **************************************************************************/ BYTE *GetRGB(DWORD colour) { DWORD j; static BYTE rgb[3]; j = (TrueColourFlag) ? colour + colour + colour : (DWORD)((colour % 256L) * 3L); *(rgb + 0) = *(PalettePtr + j + 2); *(rgb + 1) = *(PalettePtr + j + 1); *(rgb + 2) = *(PalettePtr + j + 0); return (rgb); } /************************************************************************** Plot correct pixel according to count, i, j **************************************************************************/ void outpoint(WORD x, WORD y, DWORD colour) { long i; long local_width; if (colour > (DWORD)threshold) // don't write past end of palette { if (TrueColourFlag) colour = (DWORD)threshold; else if (colour >= 255L) colour = 255L; } // first do screen if (x < 0 || x >= width || y < 0 || y >= height) return; local_width = WIDTHBYTES((DWORD)width * (DWORD)bits_per_pixel); i = ((long) (height - 1 - y) * (long) (local_width + 3 - ((local_width - 1) % 4)) + (long)(x * 3)); if (colour == (DWORD)threshold) // handle inside colour { *(pixels + i + 0) = (BYTE)InsideBlue; *(pixels + i + 1) = (BYTE)InsideGreen; *(pixels + i + 2) = (BYTE)InsideRed; } // memcpy(pixels + i, VGA_PALETTE + inside_colour * 3, 3); else memcpy(pixels + i, GetRGB(colour), 3); // Now do reference i = ((long) (height - 2 - y) * (long) (width + 3 - ((width - 1) % 4))) + (long) x; if (x >= 0 && x < xdots - 1 && y >= 0 && y < ydots - 1) *(wpixels + i) = (WORD) colour; } /************************************************************************** Read pixel colour **************************************************************************/ DWORD ingetcolor(WORD x, WORD y) { long i; long local_width; if (x < 0 || x >= width || y < 0 || y >= height) return 0L; local_width = WIDTHBYTES((DWORD)width * (DWORD)bits_per_pixel); i = ((long) (height - 1 - y) * (long) (local_width + 3 - ((local_width - 1) % 4)) + (long)(x * 3));i = ((long) (ydots - 2 - y) * (long) (xdots + 3 - ((xdots - 1) % 4))) + (long) x; if (x >= 0 && x < xdots && y >= 0 && y < ydots - 1) return ((DWORD)((*(wpixels + i)) & 0xffff)); else return 0L; } Let me know what you think :) Seeya, Paul. ---------------------------------------------------------- Paul de Leeuw Computers NSW Central Coast, Australia Email: pdeleeuw(a)deleeuw.com.au www: < http://www.deleeuw.com.au> ABN 72 360 822 562 ---------------------------------------------------------- -----Original Message----- From: fractdev-bounces+pdeleeuw=deleeuw.com.au(a)mailman.xmission.com [mailto:fractdev-bounces+pdeleeuw=deleeuw.com.au@mailman.xmission.com] On Behalf Of Richard Sent: Sunday, 14 January 2007 7:18 PM To: Fractint developer's list Subject: Re: [Fractdev] GDI output working! True colour? In article <009201c737b1$e6a831b0$0301a8c0@Production>, "Paul" <pdeleeuw(a)deleeuw.com.au> writes: > Once you get it working a bit more efficiently, I can start preparing > some true colour code for it. [...] There is some existing truecolor support, but I haven't studied that code yet. Take a look at the existing code here: <http://www.fractint.org/ftp/current/dos/fradev.zip> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/> _______________________________________________ Fractdev mailing list Fractdev(a)mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/fractdev

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lorenz.c: use of uninitialized variable color
by Richard 14 Jan '07

14 Jan '07

Hi, If you look at orbit2dlong() and orbit2dfloat(), they don't initialize the color variable. orbit3dlongcalc() and orbit3dfloatcalc() initialize color to 2. So I have followed the same method. I have added this change on the HEAD as well. If it should be something else, let me know. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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GDI output working!
by Richard 14 Jan '07

14 Jan '07

Basic GDI output is working and fractals are rendering properly. We are nearing a beta release! Things could definately be more efficient; currently the GDI output is as about as expensive as it could possibly get. (Simple, but slow.) I would like to improve the speed with some obvious optimizations before releasing it, even as a beta. However, what this does mean is that Tim and Jonathan can use the branch code in VS.NET 2003 for active experimentation with visible output. It also means that the branch is nearing an end... Tim/Jonathan: any thoughts on when we should make a release and merge the branch into the HEAD? -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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compuserve old farts
by Richard 10 Jan '07

10 Jan '07

Apparently you can still login if you know your CSID :-) <http://tech.groups.yahoo.com/group/ti99-4a/message/44436> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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GDI output
by Richard 10 Jan '07

10 Jan '07

We're getting there... at the moment, I need to move the keyboard handling code. Windows won't dispatch messages to the window proc of a window that isn't shown (or it could just be another bug in fractint I've introduced somewhere). I had designed the text/graphics switch to work like this: frame window + | +--- text window | +--- plot window The intention was to have all the text I/O code localized to the text window and the graphics I/O localized to the plot window. Switching between text and graphics modes amounts to showing and hiding child windows. The frame window would ultimately contain things like a menu. The plot window would ultimately contain scroll bars, but the first cut was just to have it fixed at the video resolution size. So I had all the keyboard code working in the text window and then when I hide it and display the plot window, my keyboard input stopped working. So I'll move the keyboard code from the text window over to the frame window. That will divide the handling this way: keyboard input, mouse input: - frame window text output - text window graphic output - plot window We might have GDI output going next weekend, we'll see how it goes. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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alpha 2
by Richard 06 Jan '07

06 Jan '07

<http://www.xmission.com/~legalize/fractals/fractdev/FractIntSetup-21.00.alp…> Use float=yes or you're not likely to get an image. Keyboard handling improved. View window parameters working for changing the size of the disk video image. Other bug fixes that I forget now :-) -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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Access Denied - Error 403: Fractint Alpha2
by Hal Lane 04 Jan '07

04 Jan '07

When I try and download Fractint Alpha2: <http://www.xmission.com/~legalize/fractals/fractdev/FractIntSetup-21.00.alp ha2.msi> I get: Access Denied - Error 403 You do not have permission to access this page. I was able to download and run Alpha1 without problems. Would whoever can set permissions allow me access to Alpha2, please? Thanks! - Hal Lane ######################### # hallane(a)earthlink.net # ######################### -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.409 / Virus Database: 268.16.4/615 - Release Date: 1/3/07

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weird!
by Richard 04 Jan '07

04 Jan '07

Click the "mandelbrot generator" link on this page :-) <http://www.cb1.com/~john/research/PhD/bath-univ.html> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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at last!
by Richard 02 Jan '07

02 Jan '07

This was so stupid, I can't believe it. OK, so I kept wondering why I always got a black screen when rendering. So I start stepping through the fractal compute code.... and it calls calcmandasm(). Which is stubbed out. To do nothing. Ah! So just set float to yes on the 'x' screen and presto! The saved GIF file is the classic fractint start image. I feel relieved that I reached at least my minimum goal before my self-imposed deadline! Since the integer mandelbrot assembly code wasn't ported to C anyway for xfractint, it seems like now's a good time to just do the float-only merge. What do you think, Tim? -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

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