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Author |
Topic: Background color of Sketch/Present (Read 1481 times) |
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JohnByrne
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Background color of Sketch/Present
« on: Jul 2nd, 2003, 2:43am » |
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The background color for Sketch/Present has been fixed to a shade of gray that on my reckoning is (102,102,102) on the RGB scale.
In the attached program (SinuousRills_1.pde)I wanted to use the background color to overwrite the image outside a circle and to use it also for the 'sinuous rills' in the image itself. So far so good.
My question is: Would it be feasible to have a programmable statement in Proce55ing to enable the user to set the background color for Sketch/Present?
John.
// 'SinuousRills_1' by John Byrne (j.byrne@mackillop.acu.edu.au), 2003.
void setup()
{
size(440,440);
}
void loop()
{
// Red background, brightest at the centre of the picture.
for(int i=0; i<(width); i++)
{
for(int j=0; j<(height); j++)
{
color r = color(200-0.5*sqrt(sq(i-width/2)+ sq(j-height/2)), 0, 0);
setPixel(i, j, r);
}
}
// Truchet/Smith pattern on an (11x11) pixel tile. Each tile is oriented 0 or 90 deg. by random allocation.
for (int i=0; i<(width); i=i+11)
{
for(int j=0; j<(height); j=j+11)
{
color gy = color(102,102,102);
float r=random(4);
if (r <= 2)
{ // tile pattern
setPixel(i+5,j,gy);
setPixel(i+5,j+1,gy);
setPixel(i+5,j+2,gy);
setPixel(i+6,j+3,gy);
setPixel(i+7,j+4,gy);
setPixel(i+8,j+5,gy);
setPixel(i+9,j+5,gy);
setPixel(i+10,j+5,gy);
setPixel(i,j+5,gy);
setPixel(i+1,j+5,gy);
setPixel(i+2,j+5,gy);
setPixel(i+3,j+6,gy);
setPixel(i+4,j+7,gy);
setPixel(i+5,j+8,gy);
setPixel(i+5,j+9,gy);
setPixel(i+5,j+10,gy);
}
else
{ // tile pattern rotated 90 deg.
setPixel(i+5,j,gy);
setPixel(i+5,j+1,gy);
setPixel(i+5,j+2,gy);
setPixel(i+4,j+3,gy);
setPixel(i+3,j+4,gy);
setPixel(i+2,j+5,gy);
setPixel(i+1,j+5,gy);
setPixel(i,j+5,gy);
setPixel(i+10,j+5,gy);
setPixel(i+9,j+5,gy);
setPixel(i+8,j+5,gy);
setPixel(i+7,j+6,gy);
setPixel(i+6,j+7,gy);
setPixel(i+5,j+8,gy);
setPixel(i+5,j+9,gy);
setPixel(i+5,j+10,gy);
}
}
}
// Set gray pixels beyond a radius of half the picture to match the background gray of P5's Sketch/Present
for(int i=0; i<(width); i++)
{
for(int j=0; j<(height); j++)
{
color gy=color(102,102,102);
if (sqrt(sq(i-width/2)+ sq(j-height/2)) > width/2)
{
setPixel(i,j,gy);
}
}
}
// Refresh the picture periodically.
delay(5000);
}
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| « Last Edit: Jul 2nd, 2003, 2:45am by JohnByrne » |
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