------------------------------------------------------------------------
| 42 | |
| 43 | //------------------------------------------------------------------------ |
| 44 | void curve3_inc::init(double x1, double y1, |
| 45 | double x2, double y2, |
| 46 | double x3, double y3) |
| 47 | { |
| 48 | m_start_x = x1; |
| 49 | m_start_y = y1; |
| 50 | m_end_x = x3; |
| 51 | m_end_y = y3; |
| 52 | |
| 53 | double dx1 = x2 - x1; |
| 54 | double dy1 = y2 - y1; |
| 55 | double dx2 = x3 - x2; |
| 56 | double dy2 = y3 - y2; |
| 57 | |
| 58 | double len = std::sqrt(dx1 * dx1 + dy1 * dy1) + std::sqrt(dx2 * dx2 + dy2 * dy2); |
| 59 | |
| 60 | m_num_steps = uround(len * 0.25 * m_scale); |
| 61 | |
| 62 | if(m_num_steps < 4) |
| 63 | { |
| 64 | m_num_steps = 4; |
| 65 | } |
| 66 | |
| 67 | double subdivide_step = 1.0 / m_num_steps; |
| 68 | double subdivide_step2 = subdivide_step * subdivide_step; |
| 69 | |
| 70 | double tmpx = (x1 - x2 * 2.0 + x3) * subdivide_step2; |
| 71 | double tmpy = (y1 - y2 * 2.0 + y3) * subdivide_step2; |
| 72 | |
| 73 | m_saved_fx = m_fx = x1; |
| 74 | m_saved_fy = m_fy = y1; |
| 75 | |
| 76 | m_saved_dfx = m_dfx = tmpx + (x2 - x1) * (2.0 * subdivide_step); |
| 77 | m_saved_dfy = m_dfy = tmpy + (y2 - y1) * (2.0 * subdivide_step); |
| 78 | |
| 79 | m_ddfx = tmpx * 2.0; |
| 80 | m_ddfy = tmpy * 2.0; |
| 81 | |
| 82 | m_step = m_num_steps; |
| 83 | } |
| 84 | |
| 85 | //------------------------------------------------------------------------ |
| 86 | void curve3_inc::rewind(unsigned) |
nothing calls this directly
no test coverage detected