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void ShapeDrawer::writeFile(string fileName)
{
ofstream outFile;
outFile.open(fileName.c_str());
outFile << "P3" << endl << "100\n100\n255\n" << endl;
for (int j = 0; j < N_ROWS; j++)
for (int i = 0; i < N_COLS; i++)
outFile << pixeldata[3*(j*N_COLS+i)] << " " << pixeldata[3*(j*N_COLS+i)+1] << " " << pixeldata[3*(j*N_COLS+i)+2] << endl;
outFile.close();
}
void ShapeDrawer::initArray()
{
for (int i = 0; i < (3*N_ROWS*N_COLS); i++) {
pixeldata[i] = 0;
}
}
void ShapeDrawer::setPixel(int X, int Y, char color, int data) {
int outtieX;
int outtieY;
Y = (N_ROWS-1) - Y;
outtieX = X;
outtieY = Y;
if ((X < 0)||(X > N_COLS)||(Y < 0)||(Y > N_ROWS)) {
return;
}
switch (color) {
case 'R': pixeldata[(3*((outtieY * (N_COLS)) + outtieX))] = data;
break;
case 'G': pixeldata[(3*((outtieY * (N_COLS)) + outtieX))+1] = data;
break;
case 'B': pixeldata[(3*((outtieY * (N_COLS)) + outtieX))+2] = data;
break;
}
}
void ShapeDrawer::setOnePixel(int X, int Y, int data) {
setPixel(X, Y, 'R', data);
setPixel(X, Y, 'G', data);
setPixel(X, Y, 'B', data);
}
void ShapeDrawer::drawLine(Line l) {
int xa = l.getStart().getX();
int ya = l.getStart().getY();
int xb = l.getEnd().getX();
int yb = l.getEnd().getY();
int red = l.getColor().getRed();
int blue = l.getColor().getBlue();
int green = l.getColor().getGreen();
int negSlope = 0;
int bigSlope = 0;
int dx = abs(xb-xa), dy = abs(yb-ya);
int p, twoDx, twoDy, twoDyDx;
int x, y, xEnd, yEnd;
if ((((float) dy / (float) dx)) > 1) {
bigSlope = 1;
}
// -1 > Slope > 1
if (bigSlope == 0) {
twoDy = 2 * dy;
twoDyDx = 2 * (dy - dx);
p = 2 * dy - dx;
if (xa > xb) {
x = xb;
y = yb;
xEnd = xa;
if ((ya-yb) < 0) {
negSlope = 1;
}
}
else {
x = xa;
y = ya;
xEnd = xb;
if ((yb-ya) < 0) {
negSlope = 1;
}
}
setPixel(x, y, 'R', red);
setPixel(x, y, 'G', green);
setPixel(x, y, 'B', blue);
// Slope > 0
if (negSlope == 0) {
while (x < xEnd) {
x++;
if (p < 0)
p += twoDy;
else {
y++;
p += twoDyDx;
}
setPixel(x, y, 'R', red);
setPixel(x, y, 'G', green);
setPixel(x, y, 'B', blue);
}
}
// Slope < 0
else {
while (x < xEnd) {
x++;
if (p < 0)
p += twoDy;
else {
y--;
p += twoDyDx;
}
setPixel(x, y, 'R', red);
setPixel(x, y, 'G', green);
setPixel(x, y, 'B', blue);
}
}
}
// -1 > Slope > 1
else {
twoDx = 2 * dx;
twoDyDx = 2 * (dx - dy);
p = 2 * dx - dy;
if (xa > xb) {
x = xb;
y = yb;
yEnd = ya;
if ((ya-yb) < 0) {
negSlope = 1;
}
}
else {
x = xa;
y = ya;
yEnd = yb;
if ((yb-ya) < 0) {
negSlope = 1;
}
}
setPixel(x, y, 'R', red);
setPixel(x, y, 'G', green);
setPixel(x, y, 'B', blue);
// Slope > 1
if (negSlope == 0) {
while (y < yEnd) {
y++;
if (p < 0)
p += twoDx;
else {
x++;
p += twoDyDx;
}
setPixel(x, y, 'R', red);
setPixel(x, y, 'G', green);
setPixel(x, y, 'B', blue);
}
}
// Slope < -1
else {
while (y > yEnd) {
y--;
if (p <= 0)
p += twoDx;
else {
x++;
p += twoDyDx;
}
setPixel(x, y, 'R', red);
setPixel(x, y, 'G', green);
setPixel(x, y, 'B', blue);
}
}
}
}
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