/*======== 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 addCurve() ==========
Inputs: int x0
int y0
int x1
int y1
int x2
int y2
int x3
int y3
Returns:
Generates the edges required to create a curve
and adds them to the edge matrix
03/09/12 18:00:06
jonalf
====================*/
public void addCurve(
double x0,
double y0,
double x1,
double y1,
double x2,
double y2,
double x3,
double y3,
int type) {
EdgeMatrix xcoefs = new EdgeMatrix(1);
EdgeMatrix ycoefs = new EdgeMatrix(1);
// a lower step value makes a more precise curve
double step = 0.01;
double x, y, z, ax, ay, bx, by, cx, cy, dx, dy;
if (type == gui.HERMITE_MODE) {
xcoefs.generateHermiteCoefs(x0, x1, x2, x3);
ycoefs.generateHermiteCoefs(y0, y1, y2, y3);
} else {
xcoefs.generateBezierCoefs(x0, x1, x2, x3);
ycoefs.generateBezierCoefs(y0, y1, y2, y3);
}
ax = xcoefs.getX(0);
bx = xcoefs.getY(0);
cx = xcoefs.getZ(0);
dx = xcoefs.getD(0);
ay = ycoefs.getX(0);
by = ycoefs.getY(0);
cy = ycoefs.getZ(0);
dy = ycoefs.getD(0);
double startx = x0;
double starty = y0;
for (double t = step; t <= 1; t += step) {
x = ax * t * t * t + bx * t * t + cx * t + dx;
y = ay * t * t * t + by * t * t + cy * t + dy;
addEdge(startx, starty, 0, x, y, 0);
startx = x;
starty = y;
}
}
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++;
}
}
}