// Read in lines from line.in and add them into collision world for simulation.
void LineDemo_createLines(LineDemo* lineDemo) {
unsigned int lineId = 0;
unsigned int numOfLines;
window_dimension px1;
window_dimension py1;
window_dimension px2;
window_dimension py2;
window_dimension vx;
window_dimension vy;
int isGray;
FILE *fin;
fin = fopen(LineDemo_input_file_path, "r");
assert(fin != NULL);
fscanf(fin, "%d\n", &numOfLines);
lineDemo->collisionWorld = CollisionWorld_new(numOfLines);
while (EOF
!= fscanf(fin, "(%lf, %lf), (%lf, %lf), %lf, %lf, %d\n", &px1, &py1, &px2,
&py2, &vx, &vy, &isGray)) {
Line *line = malloc(sizeof(Line));
// convert window coordinates to box coordinates
windowToBox(&line->p1.x, &line->p1.y, px1, py1);
windowToBox(&line->p2.x, &line->p2.y, px2, py2);
// convert window velocity to box velocity
velocityWindowToBox(&line->velocity.x, &line->velocity.y, vx, vy);
// store color
line->color = (Color) isGray;
// store line ID
line->id = lineId;
lineId++;
// precompute some information about the line
line->relative_vector = Vec_makeFromLine(*line);
line->top_left = (Vec) {.x = MIN(line->p1.x, line->p2.x), .y = MIN(line->p1.y, line->p2.y)};
line->bottom_right = (Vec) {.x = MAX(line->p1.x, line->p2.x), .y = MAX(line->p1.y, line->p2.y)};
// transfer ownership of line to collisionWorld
CollisionWorld_addLine(lineDemo->collisionWorld, line);
}
fclose(fin);
}
void LineDemo_setNumFrames(LineDemo* lineDemo, const unsigned int numFrames) {
lineDemo->numFrames = numFrames;
}
void LineDemo_initLine(LineDemo* lineDemo) {
LineDemo_createLines(lineDemo);
}
Line* LineDemo_getLine(LineDemo* lineDemo, const unsigned int index) {
return CollisionWorld_getLine(lineDemo->collisionWorld, index);
}
unsigned int LineDemo_getNumOfLines(LineDemo* lineDemo) {
return CollisionWorld_getNumOfLines(lineDemo->collisionWorld);
}
unsigned int LineDemo_getNumLineWallCollisions(LineDemo* lineDemo) {
return CollisionWorld_getNumLineWallCollisions(lineDemo->collisionWorld);
}
unsigned int LineDemo_getNumLineLineCollisions(LineDemo* lineDemo) {
return CollisionWorld_getNumLineLineCollisions(lineDemo->collisionWorld);
}
// The main simulation loop
bool LineDemo_update(LineDemo* lineDemo) {
lineDemo->count++;
CollisionWorld_updateLines(lineDemo->collisionWorld);
if (lineDemo->count > lineDemo->numFrames) {
return false;
}
return true;
}
Line* LineDemo_getLine(LineDemo* lineDemo, const unsigned int index) {
return CollisionWorld_getLine(lineDemo->collisionWorld, index);
}
