#include <math.h> #include <stdio.h> #include <string.h> #include <unistd.h> float A, B, C; float cubeWidth = 20; int width = 160, height = 44; float zBuffer[160 * 44]; char buffer[160 * 44]; int backgroundASCIICode = '.'; int distanceFromCam = 100; float horizontalOffset; float K1 = 40; float incrementSpeed = 0.6; float x, y, z; float ooz; int xp, yp; int idx; float calculateX(int i, int j, int k) { return j * sin(A) * sin(B) * cos(C) - k * cos(A) * sin(B) * cos(C) + j * cos(A) * sin(C) + k * sin(A) * sin(C) + i * cos(B) * cos(C); } float calculateY(int i, int j, int k) { return j * cos(A) * cos(C) + k * sin(A) * cos(C) - j * sin(A) * sin(B) * sin(C) + k * cos(A) * sin(B) * sin(C) - i * cos(B) * sin(C); } float calculateZ(int i, int j, int k) { return k * cos(A) * cos(B) - j * sin(A) * cos(B) + i * sin(B); } void calculateForSurface(float cubeX, float cubeY, float cubeZ, int ch) { x = calculateX(cubeX, cubeY, cubeZ); y = calculateY(cubeX, cubeY, cubeZ); z = calculateZ(cubeX, cubeY, cubeZ) + distanceFromCam; ooz = 1 / z; xp = (int)(width / 2 + horizontalOffset + K1 * ooz * x * 2); yp = (int)(height / 2 + K1 * ooz * y); idx = xp + yp * width; if (idx >= 0 && idx < width * height) { if (ooz > zBuffer[idx]) { zBuffer[idx] = ooz; buffer[idx] = ch; } } } int main() { printf("\x1b[2J"); while (1) { memset(buffer, backgroundASCIICode, width * height); memset(zBuffer, 0, width * height * 4); cubeWidth = 20; horizontalOffset = -2 * cubeWidth; // first cube for (float cubeX = -cubeWidth; cubeX < cubeWidth; cubeX += incrementSpeed) { for (float cubeY = -cubeWidth; cubeY < cubeWidth; cubeY += incrementSpeed) { calculateForSurface(cubeX, cubeY, -cubeWidth, '@'); calculateForSurface(cubeWidth, cubeY, cubeX, '$'); calculateForSurface(-cubeWidth, cubeY, -cubeX, '~'); calculateForSurface(-cubeX, cubeY, cubeWidth, '#'); calculateForSurface(cubeX, -cubeWidth, -cubeY, ';'); calculateForSurface(cubeX, cubeWidth, cubeY, '+'); } } cubeWidth = 10; horizontalOffset = 1 * cubeWidth; // second cube for (float cubeX = -cubeWidth; cubeX < cubeWidth; cubeX += incrementSpeed) { for (float cubeY = -cubeWidth; cubeY < cubeWidth; cubeY += incrementSpeed) { calculateForSurface(cubeX, cubeY, -cubeWidth, '@'); calculateForSurface(cubeWidth, cubeY, cubeX, '$'); calculateForSurface(-cubeWidth, cubeY, -cubeX, '~'); calculateForSurface(-cubeX, cubeY, cubeWidth, '#'); calculateForSurface(cubeX, -cubeWidth, -cubeY, ';'); calculateForSurface(cubeX, cubeWidth, cubeY, '+'); } } cubeWidth = 5; horizontalOffset = 8 * cubeWidth; // third cube for (float cubeX = -cubeWidth; cubeX < cubeWidth; cubeX += incrementSpeed) { for (float cubeY = -cubeWidth; cubeY < cubeWidth; cubeY += incrementSpeed) { calculateForSurface(cubeX, cubeY, -cubeWidth, '@'); calculateForSurface(cubeWidth, cubeY, cubeX, '$'); calculateForSurface(-cubeWidth, cubeY, -cubeX, '~'); calculateForSurface(-cubeX, cubeY, cubeWidth, '#'); calculateForSurface(cubeX, -cubeWidth, -cubeY, ';'); calculateForSurface(cubeX, cubeWidth, cubeY, '+'); } } printf("\x1b[H"); for (int k = 0; k < width * height; k++) { putchar(k % width ? buffer[k] : 10); } A += 0.05; B += 0.05; C += 0.01; usleep(8000 * 2); } return 0; }