昔の耳のようなドーナツを解説 その3

singleRow circle = {2 + cos(theta), sin(theta), 0};

singleRow circle = new singleRow(2 + Math.cos(theta), Math.sin(theta), 0);

// rotation on Y-axis
Matrix Ry = new Matrix(
  new singleRow(Math.cos(phi), 0, Math.sin(phi)),
  new singleRow(0, 1, 0),
  new singleRow(-Math.sin(phi), 0, Math.cos(phi))
);
// rotation on X-axis
Matrix Rx = new Matrix(
  new singleRow(1, 0, 0),
  new singleRow(0, Math.cos(A), Math.sin(A)),
  new singleRow(0, -Math.sin(A), Math.cos(A))
);
// rotation on Z-axis
Matrix Rz = new Matrix(
  new singleRow(Math.cos(B), Math.sin(B), 0),
  new singleRow(-Math.sin(B), Math.cos(B), 0),
  new singleRow(0, 0, 1)
);

// rotation on Y-axis
Matrix Ry = {{cos(phi), 0, sin(phi)}, {0, 1, 0}, {-sin(phi), 0, cos(phi)}};
// rotation on X-axis
Matrix Rx = {{1, 0, 0}, {0, cos(A), sin(A)}, {0, -sin(A), cos(A)}};
// rotation on Z-axis
Matrix Rz = {{cos(B), sin(B), 0}, {-sin(B), cos(B), 0}, {0, 0, 1}};

singleRow donut = multiply(circle, Ry);
singleRow rotateX = multiply(donut, Rx);

// We will consider it as [Nx, Ny, Nz]
singleRow spinningDonut = multiply(rotateX, Rz);

singleRow donut = Matrix.multiply(circle, Ry);
singleRow rotateX = Matrix.multiply(donut, Rx);

// We will consider it as [Nx, Ny, Nz]
singleRow spinningDonut = Matrix.multiply(rotateX, Rz);

float reciNz = 1 / (spinningDonut.a3 + 5);

int x = 40 + 30 * spinningDonut.a1 * reciNz;
int y = 12 + 15 * spinningDonut.a2 * reciNz;

// o is index of current buffer
int o = x + screen_width * y;

int L = N * 8

char charOpts[] = ".,-~:;=!*#$@";

char[] charOpts = {'.', ',', '-', '~', ':', ';', '=', '!', '*', '#', '$', '@'};

if (zBuffer[o] < reciNz && y < screen_height && x < screen_width) {
  buffer[o] = charOpts[L > 0 ? L : 0];
  zBuffer[o] = reciNz;
}