arkorty/donut.c
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Update doughnut.c

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This commit is contained in:
Arkaprabha Chakraborty
2022-02-14 10:38:21 +05:30
parent 4f0f21265e
commit 8199ad0eba
1 changed files with 53 additions and 28 deletions
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65
doughnut.c
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@@ -2,21 +2,22 @@
#include <stdbool.h> #include <stdbool.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
#if defined(_WIN32) #if defined(_WIN32)
#define WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN
#define VC_EXTRALEAN #define VC_EXTRALEAN
#include <Windows.h> #include <Windows.h>
#define STEP_ROT_X 0.1488 #define STEP_ROT_X 0.157079633
#define STEP_ROT_Y 0.0768 #define STEP_ROT_Y 0.078539816
#define STEP_THETA 0.126 #define STEP_THETA 0.130899694
#define STEP_PHI 0.063 #define STEP_ALPHA 0.065449847
#elif defined(__linux__) #elif defined(__linux__)
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <unistd.h> #include <unistd.h>
#define STEP_ROT_X 0.0093 #define STEP_ROT_X 0.012271846
#define STEP_ROT_Y 0.0048 #define STEP_ROT_Y 0.006135923
#define STEP_THETA 0.031 #define STEP_THETA 0.024543693
#define STEP_PHI 0.016 #define STEP_ALPHA 0.016028534
#endif #endif
// Clears the terminal // Clears the terminal
@@ -91,23 +92,25 @@ char **build_frame(char **frame, int size, int frmno, int k) {
// Precomputing sines and cosines of theta // Precomputing sines and cosines of theta
float cos_theta = cos(theta), sin_theta = sin(theta); float cos_theta = cos(theta), sin_theta = sin(theta);
// Loop uses phi to revolve the circle around the center of the torus // Loop uses alpha to revolve the circle around the center of the torus
for (float phi = 0; phi < 6.283186; phi += STEP_PHI) { for (float alpha = 0; alpha < 6.283186; alpha += STEP_ALPHA) {
// Precomputing sines and cosines of phi // Precomputing sines and cosines of alpha
float cos_phi = cos(phi), sin_phi = sin(phi); float cos_alpha = cos(alpha), sin_alpha = sin(alpha);
// Calculating the x and y coordinates of the circle before the // Calculating the x and y coordinates of the circle before the
// revolution // revolution
float circle_x = 2 + 1 * cos_theta, circle_y = 1 * sin_theta; float circle_x = 2 + 1 * cos_theta, circle_y = 1 * sin_theta;
// Calculating the x and y coordinates after the revolution // Calculating the x and y coordinates after the revolution
float x = circle_x * (cos_y * cos_phi + sin_x * sin_y * sin_phi) - float x =
circle_x * (cos_y * cos_alpha + sin_x * sin_y * sin_alpha) -
circle_y * cos_x * sin_y; circle_y * cos_x * sin_y;
float y = circle_x * (sin_y * cos_phi - sin_x * cos_y * sin_phi) + float y =
circle_x * (sin_y * cos_alpha - sin_x * cos_y * sin_alpha) +
circle_y * cos_x * cos_y; circle_y * cos_x * cos_y;
// Calculating z // Calculating z
float z = 5 + cos_x * circle_x * sin_phi + circle_y * sin_x; float z = 5 + cos_x * circle_x * sin_alpha + circle_y * sin_x;
// Calculating the inverse of z // Calculating the inverse of z
float z_inv = 1 / z; float z_inv = 1 / z;
@@ -118,9 +121,9 @@ char **build_frame(char **frame, int size, int frmno, int k) {
// Calculating luminous intensity // Calculating luminous intensity
float lumi_int = float lumi_int =
cos_phi * cos_theta * sin_y - cos_x * cos_theta * sin_phi - cos_alpha * cos_theta * sin_y - cos_x * cos_theta * sin_alpha -
sin_x * sin_theta + sin_x * sin_theta +
cos_y * (cos_x * sin_theta - cos_theta * sin_x * sin_phi); cos_y * (cos_x * sin_theta - cos_theta * sin_x * sin_alpha);
/* Checking if surface is pointing away from the point of view /* Checking if surface is pointing away from the point of view
* Also checking if the point is closer than any other point * Also checking if the point is closer than any other point
@@ -144,23 +147,45 @@ char **build_frame(char **frame, int size, int frmno, int k) {
return frame; return frame;
} }
int main() { int main(int argc, char **argv) {
// Getting the size of the terminal // Getting the size of the terminal
const int size = terminal_size(); int size = terminal_size();
// Allocating memory to the frame buffer // Allocating memory to the frame buffer
char **frame = allocate_memory(size); char **frame = allocate_memory(size);
int k = size * 5 * 3 / (8 * (1 + 2));
if (argc > 1 && (strcmp(argv[1], "-d") == 0 ||
strcmp(argv[1], "--enable-dynamic-resolution") == 0)) {
// Loop rotates the torus around both the axes // Loop rotates the torus around both the axes
for (int frmno = 0; true; frmno++) { for (int frmno = 0; true; frmno++) {
if (frmno % 256 == 1 && size - terminal_size() != 0) {
// Getting the size of the terminal
size = terminal_size();
// Allocating memory to the frame buffer
frame = allocate_memory(size);
k = size * 5 * 3 / (8 * (1 + 2));
}
// Building and dumping the frame into the terminal // Building and dumping the frame into the terminal
int k = size * 5 * 3 / (8 * (1 + 2));
dump_frame(build_frame(frame, size, frmno, k), size); dump_frame(build_frame(frame, size, frmno, k), size);
// Clears the screen // Clears the screen
clear_terminal(); clear_terminal();
} }
} else {
for (int frmno = 0; true; frmno++) {
// Building and dumping the frame into the terminal
dump_frame(build_frame(frame, size, frmno, k), size);
// Clears the screen
clear_terminal();
}
}
return 0; return 0;
} }