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| 1 | // NOTE: compile with g++ filename.cpp -std=c++11 | |
| 2 | // also, if this doesn't work for you, try the alternate char-based version | |
| 3 | ||
| 4 | #include <iostream> | |
| 5 | #include <cmath> | |
| 6 | #define DIM 1024 | |
| 7 | #define DM1 (DIM-1) | |
| 8 | #define _sq(x) ((x)*(x)) // square | |
| 9 | #define _cb(x) abs((x)*(x)*(x)) // absolute value of cube | |
| 10 | #define _cr(x) (unsigned short)(pow((x),1.0/3.0)) // cube root | |
| 11 | ||
| 12 | unsigned short green_fn(int,int); | |
| 13 | unsigned short blue_fn(int,int); | |
| 14 | ||
| 15 | unsigned short red_fn(int i,int j){
| |
| 16 | // YOUR CODE HERE | |
| 17 | } | |
| 18 | unsigned short green_fn(int i,int j){
| |
| 19 | // YOUR CODE HERE | |
| 20 | } | |
| 21 | unsigned short blue_fn(int i,int j){
| |
| 22 | // YOUR CODE HERE | |
| 23 | } | |
| 24 | ||
| 25 | void pixel_write(int,int); | |
| 26 | FILE *fp; | |
| 27 | int main(){
| |
| 28 | fp = fopen("MathPic","wb");
| |
| 29 | fprintf(fp, "P6\n%d %d\n1023\n", DIM, DIM); | |
| 30 | for(int j=0;j<DIM;j++) | |
| 31 | for(int i=0;i<DIM;i++) | |
| 32 | pixel_write(i,j); | |
| 33 | fclose(fp); | |
| 34 | return 0; | |
| 35 | } | |
| 36 | void pixel_write(int i, int j){
| |
| 37 | static unsigned short color[3]; | |
| 38 | color[0] = red_fn(i,j)&DM1; | |
| 39 | color[1] = green_fn(i,j)&DM1; | |
| 40 | color[2] = blue_fn(i,j)&DM1; | |
| 41 | fwrite(color, 2, 3, fp); | |
| 42 | } |
