x1a = (state->opx[a] - state->r[a] - state->xmin);
y1a = (state->opy[a] - state->r[a] - state->ymin);
x2a = (state->opx[a] + state->r[a] - state->xmin);
y2a = (state->opy[a] + state->r[a] - state->ymin);
x1a = (state->opx[a] - state->r[a] - state->xmin);
y1a = (state->opy[a] - state->r[a] - state->ymin);
x2a = (state->opx[a] + state->r[a] - state->xmin);
y2a = (state->opy[a] + state->r[a] - state->ymin);