[Arduino] color shield bi-color display

Code: Alles selecteren
ColorduinoPlasma - Plasma demo using Colorduino Library for Arduino
Copyright (c) 2011 Sam C. Lin lincomatic@hotmail.com ALL RIGHTS RESERVED

based on Color cycling plasma
Version 0.1 - 8 July 2009
Copyright (c) 2009 Ben Combee. All right reserved.
Copyright (c) 2009 Ken Corey. All right reserved.
Copyright (c) 2008 Windell H. Oskay. All right reserved.
Copyright (c) 2011 Sam C. Lin All Rights Reserved

This demo is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This demo is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include <Colorduino.h>

typedef struct
{
unsigned char r;
unsigned char g;
unsigned char b;
} ColorRGB;

//a color with 3 components: h, s and v
typedef struct
{
unsigned char h;
unsigned char s;
unsigned char v;
} ColorHSV;

unsigned char plasma[ColorduinoScreenWidth][ColorduinoScreenHeight];
long paletteShift;


//Converts an HSV color to RGB color
void HSVtoRGB(void *vRGB, void *vHSV)
{
float r, g, b, h, s, v; //this function works with floats between 0 and 1
float f, p, q, t;
int i;
ColorRGB *colorRGB=(ColorRGB *)vRGB;
ColorHSV *colorHSV=(ColorHSV *)vHSV;

h = (float)(colorHSV->h / 256.0);
s = (float)(colorHSV->s / 256.0);
v = (float)(colorHSV->v / 256.0);

//if saturation is 0, the color is a shade of grey
if(s == 0.0) {
b = v;
g = b;
r = g;
}
//if saturation > 0, more complex calculations are needed
else
{
h *= 6.0; //to bring hue to a number between 0 and 6, better for the calculations
i = (int)(floor(h)); //e.g. 2.7 becomes 2 and 3.01 becomes 3 or 4.9999 becomes 4
f = h - i;//the fractional part of h

p = (float)(v * (1.0 - s));
q = (float)(v * (1.0 - (s * f)));
t = (float)(v * (1.0 - (s * (1.0 - f))));

switch(i)
{
case 0: r=v; g=t; b=p; break;
case 1: r=q; g=v; b=p; break;
case 2: r=p; g=v; b=t; break;
case 3: r=p; g=q; b=v; break;
case 4: r=t; g=p; b=v; break;
case 5: r=v; g=p; b=q; break;
default: r = g = b = 0; break;
}
}
colorRGB->r = (int)(r * 255.0);
colorRGB->g = (int)(g * 255.0);
colorRGB->b = (int)(b * 255.0);
}

float
dist(float a, float b, float c, float d)
{
return sqrt((c-a)*(c-a)+(d-b)*(d-b));
}


void
plasma_morph()
{
unsigned char x,y;
float value;
ColorRGB colorRGB;
ColorHSV colorHSV;

for(y = 0; y < ColorduinoScreenHeight; y++)
for(x = 0; x < ColorduinoScreenWidth; x++) {
{
value = sin(dist(x + paletteShift, y, 128.0, 128.0) / 8.0)
+ sin(dist(x, y, 64.0, 64.0) / 8.0)
+ sin(dist(x, y + paletteShift / 7, 192.0, 64) / 7.0)
+ sin(dist(x, y, 192.0, 100.0) / 8.0);
colorHSV.h=(unsigned char)((value) * 128)&0xff;
colorHSV.s=255;
colorHSV.v=255;
HSVtoRGB(&colorRGB, &colorHSV);

Colorduino.SetPixel(x, y, colorRGB.r, colorRGB.g, colorRGB.b);
}
}
paletteShift++;

Colorduino.FlipPage(); // swap screen buffers to show it
}

/********************************************************
Name: ColorFill
Function: Fill the frame with a color
Parameter:R: the value of RED. Range:RED 0~255
G: the value of GREEN. Range:RED 0~255
B: the value of BLUE. Range:RED 0~255
********************************************************/
void ColorFill(unsigned char R,unsigned char G,unsigned char B)
{
PixelRGB *p = Colorduino.GetPixel(0,0);
for (unsigned char y=0;y<ColorduinoScreenWidth;y++) {
for(unsigned char x=0;x<ColorduinoScreenHeight;x++) {
p->r = R;
p->g = G;
p->b = B;
p++;
}
}

Colorduino.FlipPage();
}

void setup()
{
Colorduino.Init(); // initialize the board

// compensate for relative intensity differences in R/G/B brightness
// array of 6-bit base values for RGB (0~63)
// whiteBalVal[0]=red
// whiteBalVal[1]=green
// whiteBalVal[2]=blue
unsigned char whiteBalVal[3] = {36,63,63}; // for LEDSEE 6x6cm round matrix
Colorduino.SetWhiteBal(whiteBalVal);


// start with morphing plasma, but allow going to color cycling if desired.
paletteShift=128000;
unsigned char bcolor;

//generate the plasma once
for(unsigned char y = 0; y < ColorduinoScreenHeight; y++)
for(unsigned char x = 0; x < ColorduinoScreenWidth; x++)
{
//the plasma buffer is a sum of sines
bcolor = (unsigned char)
(
128.0 + (128.0 * sin(x*8.0 / 16.0))
+ 128.0 + (128.0 * sin(y*8.0 / 16.0))
) / 2;
plasma[x][y] = bcolor;
}

// to adjust white balance you can uncomment this line
// and comment out the plasma_morph() in loop()
// and then experiment with whiteBalVal above
// ColorFill(255,255,255);
}

void loop()
{
plasma_morph();
}