'unstubbed' o90_getLinesIntersectionPoint

svn-id: r17626
This commit is contained in:
Gregory Montoir 2005-04-16 14:22:14 +00:00
parent f958556ba6
commit ca5bb36c11

View File

@ -1979,12 +1979,111 @@ void ScummEngine_v90he::o90_getLinesIntersectionPoint() {
int line1_y1 = pop();
int line1_x1 = pop();
// XXX compute the intersection point of the 2 lines
writeVar(var_ix, 0);
writeVar(var_iy, 0);
push(1);
int result = 0;
int ix = 0;
int iy = 0;
debug(1, "o90_getLinesIntersectionPoint stub var_x=%d var y=%d line1=(%d,%d,%d,%d) line2=(%d,%d,%d,%d)", var_ix, var_iy, line1_x1, line1_y1, line1_x2, line1_y2, line2_x1, line2_y1, line2_x2, line2_y2);
bool isLine1Point = (line1_x1 == line1_x2 && line1_y1 == line1_y2);
bool isLine2Point = (line2_x1 == line2_x2 && line2_y1 == line2_y2);
if (isLine1Point) {
if (isLine2Point) {
if (line1_x1 == line2_x1 && line1_y1 == line2_y2) {
ix = line1_x1;
iy = line2_x1;
result = 1;
}
} else {
// 1 point and 1 line
int dx2 = line2_x2 - line2_x1;
if (dx2 != 0) {
int dy2 = line2_y2 - line2_y1;
float y = (float)dy2 / dx2 * (line1_x1 - line2_x1) + line2_y1 + .5f;
if (line1_y1 == (int)y) {
ix = line1_x1;
iy = line1_y1;
result = 1;
}
} else {
// vertical line
if (line1_x1 == line2_x1) {
if (line2_y1 > line2_y2) {
if (line1_y1 >= line2_y2 && line1_y1 <= line2_y1) {
ix = line1_x1;
iy = line1_y1;
result = 1;
}
} else {
if (line1_y1 >= line2_y1 && line1_y1 <= line2_y2) {
ix = line1_x1;
iy = line1_y1;
result = 1;
}
}
}
}
}
} else {
if (isLine2Point) {
// 1 point and 1 line
int dx1 = line1_x2 - line1_x1;
if (dx1 != 0) {
int dy1 = line1_y2 - line1_y1;
float y = (float)dy1 / dx1 * (line2_x1 - line1_x1) + line1_y1 + .5f;
if (line2_y1 == (int)y) {
ix = line2_x1;
iy = line2_y1;
result = 1;
}
} else {
// vertical line
if (line2_x1 == line1_x1) {
if (line1_y1 > line1_y2) {
if (line2_y1 >= line1_y2 && line2_y1 <= line1_y1) {
ix = line2_x1;
iy = line2_y1;
result = 1;
}
} else {
if (line2_y1 >= line1_y1 && line2_y1 <= line1_y2) {
ix = line2_x2;
iy = line2_y1;
result = 1;
}
}
}
}
} else {
// 2 lines
int dy1 = line1_y2 - line1_y1;
int dx1 = line1_x2 - line1_x1;
int dy2 = line2_y2 - line2_y1;
int dx2 = line2_x2 - line2_x1;
int det = dx1 * dy2 - dx2 * dy1;
int cross_p1 = dx1 * (line1_y1 - line2_y1) - dy1 * (line1_x1 - line2_x1);
int cross_p2 = dx2 * (line1_y1 - line2_y1) - dy2 * (line1_x1 - line2_x1);
if (det == 0) {
// parallel lines
if (cross_p2 == 0) {
ix = ABS(line2_x2 + line2_x1) / 2;
iy = ABS(line2_y2 + line2_y1) / 2;
result = 2;
}
} else {
float rcp1 = (float)cross_p1 / det;
float rcp2 = (float)cross_p2 / det;
if (rcp1 >= 0 && rcp1 <= 1 && rcp2 >= 0 && rcp2 <= 1) {
ix = (int)(dx1 * rcp2 + line1_x1 + .5f);
iy = (int)(dy1 * rcp2 + line1_y1 + .5f);
result = 1;
}
}
}
}
writeVar(var_ix, ix);
writeVar(var_iy, iy);
push(result);
}
void ScummEngine_v90he::getArrayDim(int array, int *dim2start, int *dim2end, int *dim1start, int *dim1end) {