/*======== public void drawLines() ==========
Inputs: PointMatrix pm
Color c
Returns:
calls drawLine so that it draws all the lines within PointMatrix pm
====================*/
public void drawLines(EdgeMatrix pm, Color c) {
for (int i = 0; i < pm.getLastCol() - 1; i += 2)
drawLine(
(int) pm.getX(i),
(int) pm.getY(i),
(int) pm.getZ(i),
(int) pm.getX(i + 1),
(int) pm.getY(i + 1),
(int) pm.getZ(i + 1),
c);
}
public void scanLine(EdgeMatrix pm, int i, Color c) {
int y0, y1, y2;
y0 = (int) pm.getY(i);
y1 = (int) pm.getY(i + 1);
y2 = (int) pm.getY(i + 2);
int T, M, B;
// y0 is Ty
if (y0 >= y1 && y0 >= y2) {
T = 0;
// y1 is My
if (y1 >= y2) {
M = 1;
B = 2;
}
// y2 is My
else {
M = 2;
B = 1;
}
}
// y1 is Ty
else if (y1 >= y0 && y1 >= y2) {
T = 1;
// y0 is My
if (y0 >= y2) {
M = 0;
B = 2;
}
// y2 is My
else {
M = 2;
B = 0;
}
}
// y2 is Ty
else {
T = 2;
// y0 is My
if (y0 >= y1) {
M = 0;
B = 1;
}
// y1 is My
else {
M = 1;
B = 0;
}
}
// Top vertices
int Tx = (int) pm.getX(i + T);
int Ty = (int) pm.getY(i + T);
int Tz = (int) pm.getZ(i + T);
// Mid vertices
int Mx = (int) pm.getX(i + M);
int My = (int) pm.getY(i + M);
int Mz = (int) pm.getZ(i + M);
// bot vertices
int Bx = (int) pm.getX(i + B);
int By = (int) pm.getY(i + B);
int Bz = (int) pm.getZ(i + B);
int d0, d1, dz0, dz1;
if (Ty != By) {
d0 = (Tx - Bx) / (Ty - By);
dz0 = (Tz - Bz) / (Ty - By);
} else {
d0 = 999999999;
dz0 = 999999999;
}
if (By != My) {
d1 = (Mx - Bx) / (My - By);
dz1 = (Mz - Bz) / (My - By);
int TBcounter = 0;
int counter = 0;
int startx = Bx;
int starty = By;
int startz = Bz;
int btom = My - By;
while (counter <= btom) {
drawLine(
startx + d0 * TBcounter,
starty + TBcounter,
startz + dz0 * TBcounter,
startx + d1 * counter,
starty + counter,
startz + dz1 * counter,
c);
TBcounter++;
counter++;
}
if (Ty == My) return;
d1 = (Tx - Mx) / (Ty - My);
dz1 = (Tz - Mz) / (Ty - My);
counter = 0;
int mtot = Ty - My;
d1 = (Tx - Mx) / (Ty - My);
dz1 = (Tz - Mz) / (Ty - My);
while (counter <= mtot) {
drawLine(
Bx + d0 * TBcounter,
By + TBcounter,
Bz + dz0 * TBcounter,
Mx + d1 * counter,
My + counter,
Mz + dz1 * counter,
c);
counter++;
TBcounter++;
}
} else {
if (Ty == My) return;
d1 = (Tx - Mx) / (Ty - My);
dz1 = (Tz - Mz) / (Ty - My);
int counter = 0;
int TBcounter = 0;
int mtot = Ty - My;
while (counter <= mtot) {
drawLine(
Bx + d0 * TBcounter,
By + TBcounter,
Bz + dz0 * TBcounter,
Mx + d1 * counter,
My + counter,
Mz + dz1 * counter,
c);
counter++;
TBcounter++;
}
}
}