void FrameBuffer::Draw2DBigPoint(int u0, int v0, int psize, const V3 &color, float z) {
for (int v = v0-psize/2; v <= v0+psize/2; v++) {
for (int u = u0-psize/2; u <= u0+psize/2; u++) {
SetGuarded(u, v, color.GetColor(), z);
}
}
}
//d. Draw 2-D segment with color interpolation
void FrameBuffer::Draw2DSegment(V3 p0, V3 c0, V3 p1, V3 c1)
{
float dx = fabsf(p0[0]-p1[0]);
float dy = fabsf(p0[1]-p1[1]);
int n;
if (dx < dy)
n = 1+(int)dy;
else
n = 1+(int)dx;
for (int i = 0; i < n; i++) {
float frac = (float) i / (float) (n-1);
V3 curr = p0 + (p1-p0)*frac;
V3 currc = c0 + (c1-c0)*frac;
int u = (int) curr[0];
int v = (int) curr[1];
SetGuarded(u, v, currc.GetColor());
}
}
void FrameBuffer::Draw2DBigPoint(V3 pp, int psize, V3 color)
{
int u0 = (int) pp[0];
int v0 = (int) pp[1];
for (int v = v0-psize/2; v <= v0+psize/2; v++) {
if (v < 0 || v > h-1)
continue;
for (int u = u0-psize/2; u <= u0+psize/2; u++) {
if (u < 0 || u > w-1)
continue;
int uv = (h-1-v)*w+u;
if (zb[uv] > pp[2])
continue;
zb[uv] = pp[2];
Set(u, v, color.GetColor());
}
}
}
/**
* Draw 2D segment with color interpolation.
*
* @param p0 the first point of the segment
* @param c0 the color of the first point
* @param p1 the second point of the segment
* @param c1 the color of the second point
*/
void FrameBuffer::Draw2DSegment(const V3 &p0, const V3 &c0, const V3 &p1, const V3 &c1) {
float dx = fabsf(p0.x() - p1.x());
float dy = fabsf(p0.y() - p1.y());
int n;
if (dx < dy) {
n = 1 + (int)dy;
} else {
n = 1 + (int)dx;
}
for (int i = 0; i <= n; i++) {
float frac = (float) i / (float)n;
V3 curr = p0 + (p1-p0) * frac;
V3 currc = c0 + (c1-c0) * frac;
int u = (int)curr[0];
int v = (int)curr[1];
SetGuarded(u, v, currc.GetColor(), curr[2]);
}
}
