Kenji Arai / Mbed OS DISCO-F769NI_several_example

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Dependencies:   BD_SD_DISCO_F769NI BSP_DISCO_F769NI LCD_DISCO_F769NI TS_DISCO_F769NI USBHost_F769NI

Mandelbrot/mandelbrot.cpp@3:35ac9ee7d2d6, 2019-08-07 (annotated)

Committer:
kenjiArai
Date:
Wed Aug 07 05:39:01 2019 +0000
Revision:
3:35ac9ee7d2d6
Child:
4:0f4affc00183
1st trial revision (Not finalized yet)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 3:35ac9ee7d2d6 1 //------------------------------------------------------
kenjiArai 3:35ac9ee7d2d6 2 // Class for drawing Mandelbrot set
kenjiArai 3:35ac9ee7d2d6 3 // 2015/11/03, Copyright (c) 2015 MIKAMI, Naoki
kenjiArai 3:35ac9ee7d2d6 4 //-----------------------------------------------------------
kenjiArai 3:35ac9ee7d2d6 5 // Modified by JH1PJL/K.Arai July 25th,2019 for DISCO-F769NI
kenjiArai 3:35ac9ee7d2d6 6
kenjiArai 3:35ac9ee7d2d6 7 #include "mandelbrot.hpp"
kenjiArai 3:35ac9ee7d2d6 8
kenjiArai 3:35ac9ee7d2d6 9 namespace Mikami
kenjiArai 3:35ac9ee7d2d6 10 {
kenjiArai 3:35ac9ee7d2d6 11 void MandelbrotBase::Display(float x1, float x2, float y1, float y2)
kenjiArai 3:35ac9ee7d2d6 12 {
kenjiArai 3:35ac9ee7d2d6 13 x1_ = x1;
kenjiArai 3:35ac9ee7d2d6 14 y1_ = y1;
kenjiArai 3:35ac9ee7d2d6 15
kenjiArai 3:35ac9ee7d2d6 16 ax_ = (x2 - x1)/(NX_ - 1);
kenjiArai 3:35ac9ee7d2d6 17 ay_ = (y2 - y1)/(NY_ - 1);
kenjiArai 3:35ac9ee7d2d6 18
kenjiArai 3:35ac9ee7d2d6 19 for (int nx=0; nx<NX_; nx++)
kenjiArai 3:35ac9ee7d2d6 20 for (int ny=0; ny<NY_; ny++)
kenjiArai 3:35ac9ee7d2d6 21 {
kenjiArai 3:35ac9ee7d2d6 22 uint32_t color = GetColor(Converge(Complex(Fx(nx), Fy(ny))));
kenjiArai 3:35ac9ee7d2d6 23 LCD_->DrawPixel(X0_+nx, Y0_+ny, color);
kenjiArai 3:35ac9ee7d2d6 24 }
kenjiArai 3:35ac9ee7d2d6 25 }
kenjiArai 3:35ac9ee7d2d6 26
kenjiArai 3:35ac9ee7d2d6 27 // discrimination of congergence
kenjiArai 3:35ac9ee7d2d6 28 int MandelbrotBase::Converge(Complex c)
kenjiArai 3:35ac9ee7d2d6 29 {
kenjiArai 3:35ac9ee7d2d6 30 Complex zn = 0; // initial value
kenjiArai 3:35ac9ee7d2d6 31
kenjiArai 3:35ac9ee7d2d6 32 for (int n=1; n<=MAX_COUNT_; n++)
kenjiArai 3:35ac9ee7d2d6 33 {
kenjiArai 3:35ac9ee7d2d6 34 zn = zn*zn + c;
kenjiArai 3:35ac9ee7d2d6 35 if ((Sqr(zn.real()) + Sqr(zn.imag())) > 4)
kenjiArai 3:35ac9ee7d2d6 36 return(n); // diverge
kenjiArai 3:35ac9ee7d2d6 37 }
kenjiArai 3:35ac9ee7d2d6 38 return 0; // converge
kenjiArai 3:35ac9ee7d2d6 39 }
kenjiArai 3:35ac9ee7d2d6 40
kenjiArai 3:35ac9ee7d2d6 41 // Get the color corresponding to the number of repititions (Color1)
kenjiArai 3:35ac9ee7d2d6 42 uint32_t MandelbrotColor1::GetColor(int x)
kenjiArai 3:35ac9ee7d2d6 43 {
kenjiArai 3:35ac9ee7d2d6 44 if (x == 0) return LCD_COLOR_BLACK;
kenjiArai 3:35ac9ee7d2d6 45 uint32_t clr[] = { LCD_COLOR_BLUE, LCD_COLOR_CYAN, LCD_COLOR_LIGHTGREEN,
kenjiArai 3:35ac9ee7d2d6 46 LCD_COLOR_GREEN, LCD_COLOR_YELLOW, LCD_COLOR_LIGHTYELLOW,
kenjiArai 3:35ac9ee7d2d6 47 LCD_COLOR_RED, LCD_COLOR_DARKMAGENTA, LCD_COLOR_MAGENTA};
kenjiArai 3:35ac9ee7d2d6 48 return clr[(x-1) % 9];
kenjiArai 3:35ac9ee7d2d6 49 }
kenjiArai 3:35ac9ee7d2d6 50
kenjiArai 3:35ac9ee7d2d6 51 // Get the color corresponding to the number of repititions (Color2)
kenjiArai 3:35ac9ee7d2d6 52 uint32_t MandelbrotColor2::GetColor(int x)
kenjiArai 3:35ac9ee7d2d6 53 {
kenjiArai 3:35ac9ee7d2d6 54 int b = Max255(20 + x*50);
kenjiArai 3:35ac9ee7d2d6 55 int g = (x > 5) ? Max255((x - 5)*30) : 0;
kenjiArai 3:35ac9ee7d2d6 56 int r = (x > 20) ? Max255((x - 20)*10) : 0;
kenjiArai 3:35ac9ee7d2d6 57 return 0xFF000000 | (r << 16) | (g << 8) | b;
kenjiArai 3:35ac9ee7d2d6 58 }
kenjiArai 3:35ac9ee7d2d6 59 }