Function CDrawTailImpl

Source/Objects/movementobject.cpp:3232–3379

}

void CDrawTailImpl(
    MovementObject* mo,
    float& time,
    float& time_step,
    CScriptArrayWrapper<int>& ik_chain_elements,
    CScriptArrayWrapper<int>& ik_chain_start_index,
    CScriptArrayWrapper<int>& ik_chain_length,
    CScriptArrayWrapper<vec3>& tail_points,
    CScriptArrayWrapper<vec3>& old_tail_points,
    CScriptArrayWrapper<vec3>& temp_old_tail_points,
    CScriptArrayWrapper<vec3>& tail_correction,
    CScriptArrayWrapper<float>& tail_section_length,
    int num_frames) {
    MovementObject& this_mo = *mo;
    RiggedObject& rigged_object = *this_mo.rigged_object();
    Skeleton& skeleton = rigged_object.skeleton();

    int chain_start = ik_chain_start_index[kTailIK];
    int chain_length = ik_chain_length[kTailIK];

    // Tail wag behavior
    bool wag_tail = false;
    if (wag_tail) {
        float wag_freq = 5.0f;
        vec3 tail_root = rigged_object_GetTransformedBonePoint(ik_chain_elements[chain_start + chain_length - 1], 0);
        int hip_bone = skeleton_GetParent(ik_chain_elements[chain_start + chain_length - 1]);
        vec3 axis = rigged_object_GetFrameMatrix(hip_bone).rotation * vec3(0, 0, 1);
        quaternion rotation(vec4(axis, sin(time * wag_freq)));
        for (int i = 0, len = chain_length; i < len; ++i) {
            BoneTransform mat = rigged_object_GetFrameMatrix(ik_chain_elements[chain_start + i]);
            mat.origin -= tail_root;
            mat = rotation * mat;
            mat.origin += tail_root;
            rigged_object_SetFrameMatrix(ik_chain_elements[chain_start + i], mat);
        }
    }

    bool ambient_tail = false;
    if (ambient_tail) {
        vec3 tail_root = rigged_object_GetTransformedBonePoint(ik_chain_elements[chain_start + chain_length - 1], 0);
        int hip_bone = skeleton_GetParent(ik_chain_elements[chain_start + chain_length - 1]);
        vec3 axis = rigged_object_GetFrameMatrix(hip_bone).rotation * vec3(0, 0, 1);
        quaternion rotation(vec4(axis, (sin(time) + sin(time * 1.3f)) * 0.2f));
        for (int i = 0, len = chain_length; i < len; ++i) {
            BoneTransform mat = rigged_object_GetFrameMatrix(ik_chain_elements[chain_start + i]);
            mat.origin -= tail_root;
            mat = rotation * mat;
            mat.origin += tail_root;
            rigged_object_SetFrameMatrix(ik_chain_elements[chain_start + i], mat);
        }
    }

    bool twitch_tail_tip = false;
    if (twitch_tail_tip) {
        float wag_freq = 5.0f;
        vec3 tail_root = rigged_object_GetTransformedBonePoint(ik_chain_elements[chain_start + 0], 0);
        int hip_bone = skeleton_GetParent(ik_chain_elements[chain_start + chain_length - 1]);
        vec3 axis = rigged_object_GetFrameMatrix(hip_bone).rotation * vec3(0, 0, 1);