CPLErr TerragenDataset::SetProjection( const char * pszNewProjection )
{
// Terragen files aren't really georeferenced, but
// we should get the projection's linear units so
// that we can scale elevations correctly.
//m_dSCAL = 30.0; // default
OGRSpatialReference oSRS( pszNewProjection );
/* -------------------------------------------------------------------- */
/* Linear units. */
/* -------------------------------------------------------------------- */
m_bIsGeo = (oSRS.IsGeographic() != FALSE);
if(m_bIsGeo)
{
// The caller is using degrees. We need to convert
// to meters, otherwise we can't derive a SCAL
// value to scale elevations with.
m_bIsGeo = true;
}
else
{
double dfLinear = oSRS.GetLinearUnits();
if( approx_equal(dfLinear, 0.3048))
m_dMetersPerGroundUnit = 0.3048;
else if( approx_equal(dfLinear, atof(SRS_UL_US_FOOT_CONV)) )
m_dMetersPerGroundUnit = atof(SRS_UL_US_FOOT_CONV);
else
m_dMetersPerGroundUnit = 1.0;
}
return CE_None;
}
void game_system::update()
{
camera_.prev_position = camera_.position;
camera_.prev_target = camera_.target;
camera_.prev_up = camera_.prev_up;
if (!approx_equal(camera_.roll_angles, float2::zero)) {
const float dist = len(camera_.target - camera_.position);
float3 fwd = normalize(camera_.target - camera_.position);
float3 ox = cross(fwd, camera_.up);
ox.y = 0.0f; // ox is always parallel the world's OX.
ox = normalize(ox);
if (!approx_equal(0.0f, camera_.roll_angles.y)) {
const quat q = from_axis_angle_rotation(float3::unit_y, camera_.roll_angles.y);
camera_.position = dist * normalize(rotate(q, camera_.position));
ox = rotate(q, ox);
ox.y = 0.0f;
ox = normalize(ox);
}
if (!approx_equal(0.0f, camera_.roll_angles.x)) {
const quat q = from_axis_angle_rotation(ox, camera_.roll_angles.x);
camera_.position = dist * normalize(rotate(q, camera_.position));
}
fwd = normalize(camera_.target - camera_.position);
camera_.up = normalize(cross(ox, fwd));
}
camera_.roll_angles = float2::zero;
}
void game_system::on_mouse_move()
{
const float2 curr_pos(float(input_state_.mouse_position.x), float(input_state_.mouse_position.y));
const float2 diff = curr_pos - camera_.mouse_position_prev;
camera_.mouse_position_prev = curr_pos;
if (!is_mouse_middle_down(input_state_) || approx_equal(diff, float2::zero)) return;
// mouse offset by x means rotation around OY (yaw)
const bool x_offset_sufficient = !approx_equal(diff.x, 0.0f, 0.01f);
if (x_offset_sufficient)
camera_.roll_angles.y += (diff.x > 0.0f) ? -pi_128 : pi_128;
// mouse offset by x means rotation around OX (pitch)
const bool y_offset_sufficient = !approx_equal(diff.y, 0.0f, 0.01f);
if (y_offset_sufficient)
camera_.roll_angles.x += (diff.y > 0.0f) ? pi_128 : -pi_128;
}
void test_float(char * label, float actual, float expected, float tolerance)
{
if (approx_equal(expected, actual, tolerance))
{
printf("Pass: %s: %f ~= %f\n", label, expected, actual);
tests_passed++;
}
else
{
printf("Fail: %s: expected %f, got %f\n", label, expected, actual);
}
tests_run++;
}
void satisfied_guide_cns(SPDesktop const &desktop,
std::vector<Inkscape::SnapCandidatePoint> const &snappoints,
std::vector<SPGuideConstraint> &cns)
{
SPNamedView const &nv = *sp_desktop_namedview(&desktop);
for (GSList const *l = nv.guides; l != NULL; l = l->next) {
SPGuide &g = *SP_GUIDE(l->data);
for (unsigned int i = 0; i < snappoints.size(); ++i) {
if (approx_equal( g.getDistanceFrom(snappoints[i].getPoint()), 0) ) {
cns.push_back(SPGuideConstraint(&g, i));
}
}
}
}
const measurement_unit* LevellerDataset::get_uom(double dM) const
{
for(size_t i = kFirstLinearMeasureIdx; i < array_size(kUnits); i++)
{
if(dM >= 1.0e-4)
{
if(approx_equal(dM, kUnits[i].dScale))
return &kUnits[i];
}
else if(dM == kUnits[i].dScale)
return &kUnits[i];
}
CPLError( CE_Failure, CPLE_AppDefined,
"Unknown measurement conversion factor: %f", dM );
return NULL;
}
/// compare script values for equallity
bool equal(const ScriptValueP& a, const ScriptValueP& b) {
if (a == b) return true;
ScriptType at = a->type(), bt = b->type();
if (at == bt && at == SCRIPT_INT) {
return a->toInt() == b->toInt();
} else if (at == bt && at == SCRIPT_BOOL) {
return a->toBool() == b->toBool();
} else if ((at == SCRIPT_INT || at == SCRIPT_DOUBLE) &&
(bt == SCRIPT_INT || bt == SCRIPT_DOUBLE)) {
return approx_equal( a->toDouble(), b->toDouble());
} else if (at == SCRIPT_COLLECTION && bt == SCRIPT_COLLECTION) {
// compare each element
if (a->itemCount() != b->itemCount()) return false;
ScriptValueP a_it = a->makeIterator();
ScriptValueP b_it = b->makeIterator();
while (true) {
ScriptValueP a_v = a_it->next();
ScriptValueP b_v = b_it->next();
if (!a_v || !b_v) return a_v == b_v;
if (!equal(a_v, b_v)) return false;
}
} else {
String as, bs;
const void* ap, *bp;
CompareWhat aw = a->compareAs(as, ap);
CompareWhat bw = b->compareAs(bs, bp);
// compare pointers or strings
if (aw == COMPARE_AS_STRING || bw == COMPARE_AS_STRING) {
return as == bs;
} else if (aw == COMPARE_AS_POINTER || bw == COMPARE_AS_POINTER) {
return ap == bp;
} else {
return false;
}
}
}