void CModelAbstract::CalcSelectionBox()
{
if (m_CustomSelectionShape)
{
// custom shape
switch(m_CustomSelectionShape->m_Type)
{
case CustomSelectionShape::BOX:
{
// create object-space bounds according to the information in the descriptor, and transform them to world-space.
// the box is centered on the X and Z axes, but extends from 0 to its height on the Y axis.
const float width = m_CustomSelectionShape->m_Size0;
const float depth = m_CustomSelectionShape->m_Size1;
const float height = m_CustomSelectionShape->m_Height;
CBoundingBoxAligned bounds;
bounds += CVector3D(-width/2.f, 0, -depth/2.f);
bounds += CVector3D( width/2.f, height, depth/2.f);
bounds.Transform(GetTransform(), m_SelectionBox);
}
break;
case CustomSelectionShape::CYLINDER:
{
// TODO: unimplemented
m_SelectionBox.SetEmpty();
LOGWARNING(L"[ModelAbstract] TODO: Cylinder selection boxes are not yet implemented. Use BOX or BOUNDS selection shapes instead.");
}
break;
default:
{
m_SelectionBox.SetEmpty();
//LOGWARNING(L"[ModelAbstract] Unrecognized selection shape type: %ld", m_CustomSelectionShape->m_Type);
debug_warn("[ModelAbstract] Unrecognized selection shape type");
}
break;
}
}
else
{
// standard method
// Get the object-space bounds that should be used to construct this model (and its children)'s selection box
CBoundingBoxAligned objBounds = GetObjectSelectionBoundsRec();
if (objBounds.IsEmpty())
{
m_SelectionBox.SetEmpty(); // model does not wish to participate in selection
return;
}
// Prevent the bounding box from extending through the terrain; clip the lower plane at Y=0 in object space.
if (objBounds[1].Y > 0.f) // should always be the case, unless the models are defined really weirdly
objBounds[0].Y = std::max(0.f, objBounds[0].Y);
// transform object-space axis-aligned bounds to world-space arbitrary-aligned box
objBounds.Transform(GetTransform(), m_SelectionBox);
}
}
const CBoundingBoxAligned CModel::GetObjectSelectionBoundsRec()
{
CBoundingBoxAligned objBounds = GetObjectBounds(); // updates the (children-not-included) object-space bounds if necessary
// now extend these bounds to include the props' selection bounds (if any)
for (size_t i = 0; i < m_Props.size(); ++i)
{
const Prop& prop = m_Props[i];
if (prop.m_Hidden)
continue; // prop is hidden from rendering, so it also shouldn't be used for selection
CBoundingBoxAligned propSelectionBounds = prop.m_Model->GetObjectSelectionBoundsRec();
if (propSelectionBounds.IsEmpty())
continue; // submodel does not wish to participate in selection box, exclude it
// We have the prop's bounds in its own object-space; now we need to transform them so they can be properly added
// to the bounds in our object-space. For that, we need the transform of the prop attachment point.
//
// We have the prop point information; however, it's not trivial to compute its exact location in our object-space
// since it may or may not be attached to a bone (see SPropPoint), which in turn may or may not be in the middle of
// an animation. The bone matrices might be of interest, but they're really only meant to be used for the animation
// system and are quite opaque to use from the outside (see @ref ValidatePosition).
//
// However, a nice side effect of ValidatePosition is that it also computes the absolute world-space transform of
// our props and sets it on their respective models. In particular, @ref ValidatePosition will compute the prop's
// world-space transform as either
//
// T' = T x B x O
// or
// T' = T x O
//
// where T' is the prop's world-space transform, T is our world-space transform, O is the prop's local
// offset/rotation matrix, and B is an optional transformation matrix of the bone the prop is attached to
// (taking into account animation and everything).
//
// From this, it is clear that either O or B x O is the object-space transformation matrix of the prop. So,
// all we need to do is apply our own inverse world-transform T^(-1) to T' to get our desired result. Luckily,
// this is precomputed upon setting the transform matrix (see @ref SetTransform), so it is free to fetch.
CMatrix3D propObjectTransform = prop.m_Model->GetTransform(); // T'
propObjectTransform.Concatenate(GetInvTransform()); // T^(-1) x T'
// Transform the prop's bounds into our object coordinate space
CBoundingBoxAligned transformedPropSelectionBounds;
propSelectionBounds.Transform(propObjectTransform, transformedPropSelectionBounds);
objBounds += transformedPropSelectionBounds;
}
return objBounds;
}
CBoundingBoxOriented::CBoundingBoxOriented(const CBoundingBoxAligned& bound)
{
if (bound.IsEmpty())
{
SetEmpty();
}
else
{
bound.GetCentre(m_Center);
// the axes of an AABB are the world-space axes
m_Basis[0].X = 1.f; m_Basis[0].Y = 0.f; m_Basis[0].Z = 0.f;
m_Basis[1].X = 0.f; m_Basis[1].Y = 1.f; m_Basis[1].Z = 0.f;
m_Basis[2].X = 0.f; m_Basis[2].Y = 0.f; m_Basis[2].Z = 1.f;
// element-wise division by two to get half sizes (remember, [1] and [0] are the max and min coord points)
m_HalfSizes = (bound[1] - bound[0]) * 0.5f;
}
}
void SimRender::ConstructBoxOutline(const CBoundingBoxAligned& bound, SOverlayLine& overlayLine)
{
overlayLine.m_Coords.clear();
if (bound.IsEmpty())
return;
const CVector3D& pMin = bound[0];
const CVector3D& pMax = bound[1];
// floor square
overlayLine.PushCoords(pMin.X, pMin.Y, pMin.Z);
overlayLine.PushCoords(pMax.X, pMin.Y, pMin.Z);
overlayLine.PushCoords(pMax.X, pMin.Y, pMax.Z);
overlayLine.PushCoords(pMin.X, pMin.Y, pMax.Z);
overlayLine.PushCoords(pMin.X, pMin.Y, pMin.Z);
// roof square
overlayLine.PushCoords(pMin.X, pMax.Y, pMin.Z);
overlayLine.PushCoords(pMax.X, pMax.Y, pMin.Z);
overlayLine.PushCoords(pMax.X, pMax.Y, pMax.Z);
overlayLine.PushCoords(pMin.X, pMax.Y, pMax.Z);
overlayLine.PushCoords(pMin.X, pMax.Y, pMin.Z);
}
///////////////////////////////////////////////////////////////////////////////////////////////////
// CalcShadowMatrices: calculate required matrices for shadow map generation - the light's
// projection and transformation matrices
void ShadowMapInternals::CalcShadowMatrices()
{
CRenderer& renderer = g_Renderer;
float minZ = ShadowBound[0].Z;
ShadowBound.IntersectFrustumConservative(LightspaceCamera.GetFrustum());
// ShadowBound might have been empty to begin with, producing an empty result
if (ShadowBound.IsEmpty())
{
// no-op
LightProjection.SetIdentity();
TextureMatrix = LightTransform;
return;
}
// round off the shadow boundaries to sane increments to help reduce swim effect
float boundInc = 16.0f;
ShadowBound[0].X = floor(ShadowBound[0].X / boundInc) * boundInc;
ShadowBound[0].Y = floor(ShadowBound[0].Y / boundInc) * boundInc;
ShadowBound[1].X = ceil(ShadowBound[1].X / boundInc) * boundInc;
ShadowBound[1].Y = ceil(ShadowBound[1].Y / boundInc) * boundInc;
// minimum Z bound must not be clipped too much, because objects that lie outside
// the shadow bounds cannot cast shadows either
// the 2.0 is rather arbitrary: it should be big enough so that we won't accidentally miss
// a shadow generator, and small enough not to affect Z precision
ShadowBound[0].Z = minZ - 2.0;
// Setup orthogonal projection (lightspace -> clip space) for shadowmap rendering
CVector3D scale = ShadowBound[1] - ShadowBound[0];
CVector3D shift = (ShadowBound[1] + ShadowBound[0]) * -0.5;
if (scale.X < 1.0)
scale.X = 1.0;
if (scale.Y < 1.0)
scale.Y = 1.0;
if (scale.Z < 1.0)
scale.Z = 1.0;
scale.X = 2.0 / scale.X;
scale.Y = 2.0 / scale.Y;
scale.Z = 2.0 / scale.Z;
// make sure a given world position falls on a consistent shadowmap texel fractional offset
float offsetX = fmod(ShadowBound[0].X - LightTransform._14, 2.0f/(scale.X*EffectiveWidth));
float offsetY = fmod(ShadowBound[0].Y - LightTransform._24, 2.0f/(scale.Y*EffectiveHeight));
LightProjection.SetZero();
LightProjection._11 = scale.X;
LightProjection._14 = (shift.X + offsetX) * scale.X;
LightProjection._22 = scale.Y;
LightProjection._24 = (shift.Y + offsetY) * scale.Y;
LightProjection._33 = scale.Z;
LightProjection._34 = shift.Z * scale.Z + renderer.m_ShadowZBias;
LightProjection._44 = 1.0;
// Calculate texture matrix by creating the clip space to texture coordinate matrix
// and then concatenating all matrices that have been calculated so far
float texscalex = scale.X * 0.5f * (float)EffectiveWidth / (float)Width;
float texscaley = scale.Y * 0.5f * (float)EffectiveHeight / (float)Height;
float texscalez = scale.Z * 0.5f;
CMatrix3D lightToTex;
lightToTex.SetZero();
lightToTex._11 = texscalex;
lightToTex._14 = (offsetX - ShadowBound[0].X) * texscalex;
lightToTex._22 = texscaley;
lightToTex._24 = (offsetY - ShadowBound[0].Y) * texscaley;
lightToTex._33 = texscalez;
lightToTex._34 = -ShadowBound[0].Z * texscalez;
lightToTex._44 = 1.0;
TextureMatrix = lightToTex * LightTransform;
}
std::vector<entity_id_t> EntitySelection::PickEntitiesAtPoint(CSimulation2& simulation, const CCamera& camera, int screenX, int screenY, player_id_t player, bool allowEditorSelectables)
{
CVector3D origin, dir;
camera.BuildCameraRay(screenX, screenY, origin, dir);
CmpPtr<ICmpRangeManager> cmpRangeManager(simulation, SYSTEM_ENTITY);
ENSURE(cmpRangeManager);
std::vector<std::pair<float, entity_id_t> > hits; // (dist^2, entity) pairs
const CSimulation2::InterfaceListUnordered& ents = simulation.GetEntitiesWithInterfaceUnordered(IID_Selectable);
for (CSimulation2::InterfaceListUnordered::const_iterator it = ents.begin(); it != ents.end(); ++it)
{
entity_id_t ent = it->first;
// Check if this entity is only selectable in Atlas
if (!allowEditorSelectables && static_cast<ICmpSelectable*>(it->second)->IsEditorOnly())
continue;
// Ignore entities hidden by LOS (or otherwise hidden, e.g. when not IsInWorld)
if (cmpRangeManager->GetLosVisibility(ent, player) == ICmpRangeManager::VIS_HIDDEN)
continue;
CmpPtr<ICmpVisual> cmpVisual(simulation.GetSimContext(), ent);
if (!cmpVisual)
continue;
CVector3D center;
float tmin, tmax;
CBoundingBoxOriented selectionBox = cmpVisual->GetSelectionBox();
if (selectionBox.IsEmpty())
{
if (!allowEditorSelectables)
continue;
// Fall back to using old AABB selection method for decals
// see: http://trac.wildfiregames.com/ticket/1032
CBoundingBoxAligned aABBox = cmpVisual->GetBounds();
if (aABBox.IsEmpty())
continue;
if (!aABBox.RayIntersect(origin, dir, tmin, tmax))
continue;
aABBox.GetCentre(center);
}
else
{
if (!selectionBox.RayIntersect(origin, dir, tmin, tmax))
continue;
center = selectionBox.m_Center;
}
// Find the perpendicular distance from the object's centre to the picker ray
float dist2;
CVector3D closest = origin + dir * (center - origin).Dot(dir);
dist2 = (closest - center).LengthSquared();
hits.push_back(std::make_pair(dist2, ent));
}
// Sort hits by distance
std::sort(hits.begin(), hits.end()); // lexicographic comparison
// Extract the entity IDs
std::vector<entity_id_t> hitEnts;
hitEnts.reserve(hits.size());
for (size_t i = 0; i < hits.size(); ++i)
hitEnts.push_back(hits[i].second);
return hitEnts;
}
void TerrainRenderer::RenderTerrainOverlayTexture(CMatrix3D& textureMatrix)
{
#if CONFIG2_GLES
#warning TODO: implement TerrainRenderer::RenderTerrainOverlayTexture for GLES
UNUSED2(textureMatrix);
#else
ENSURE(m->phase == Phase_Render);
std::vector<CPatchRData*>& visiblePatches = m->visiblePatches;
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(0);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(&textureMatrix._11);
glMatrixMode(GL_MODELVIEW);
CShaderProgramPtr dummyShader = g_Renderer.GetShaderManager().LoadProgram("fixed:dummy", CShaderDefines());
dummyShader->Bind();
CPatchRData::RenderStreams(visiblePatches, dummyShader, STREAM_POS|STREAM_POSTOUV0);
dummyShader->Unbind();
// To make the overlay visible over water, render an additional map-sized
// water-height patch
CBoundingBoxAligned waterBounds;
for (size_t i = 0; i < m->visiblePatches.size(); ++i)
{
CPatchRData* data = m->visiblePatches[i];
waterBounds += data->GetWaterBounds();
}
if (!waterBounds.IsEmpty())
{
float h = g_Renderer.GetWaterManager()->m_WaterHeight + 0.05f; // add a delta to avoid z-fighting
float waterPos[] = {
waterBounds[0].X, h, waterBounds[0].Z,
waterBounds[1].X, h, waterBounds[0].Z,
waterBounds[0].X, h, waterBounds[1].Z,
waterBounds[1].X, h, waterBounds[1].Z
};
glVertexPointer(3, GL_FLOAT, 3*sizeof(float), waterPos);
glTexCoordPointer(3, GL_FLOAT, 3*sizeof(float), waterPos);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glDepthMask(1);
glDisable(GL_BLEND);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
#endif
}
std::vector<entity_id_t> EntitySelection::PickEntitiesAtPoint(CSimulation2& simulation, const CCamera& camera, int screenX, int screenY, player_id_t player, bool allowEditorSelectables, int range)
{
PROFILE2("PickEntitiesAtPoint");
CVector3D origin, dir;
camera.BuildCameraRay(screenX, screenY, origin, dir);
CmpPtr<ICmpRangeManager> cmpRangeManager(simulation, SYSTEM_ENTITY);
ENSURE(cmpRangeManager);
/* We try to approximate where the mouse is hovering by drawing a ray from
* the center of the camera and through the mouse then taking the position
* at which the ray intersects the terrain. */
// TODO: Do this smarter without being slow.
CVector3D pos3d = camera.GetWorldCoordinates(screenX, screenY, true);
// Change the position to 2D by removing the terrain height.
CFixedVector2D pos(fixed::FromFloat(pos3d.X), fixed::FromFloat(pos3d.Z));
// Get a rough group of entities using our approximated origin.
SpatialQueryArray ents;
cmpRangeManager->GetSubdivision()->GetNear(ents, pos, entity_pos_t::FromInt(range));
// Filter for relevent entities and calculate precise distances.
std::vector<std::pair<float, entity_id_t> > hits; // (dist^2, entity) pairs
for (int i = 0; i < ents.size(); ++i)
{
CmpPtr<ICmpSelectable> cmpSelectable(simulation, ents[i]);
if (!cmpSelectable)
continue;
CEntityHandle handle = cmpSelectable->GetEntityHandle();
// Check if this entity is only selectable in Atlas
if (!allowEditorSelectables && cmpSelectable->IsEditorOnly())
continue;
// Ignore entities hidden by LOS (or otherwise hidden, e.g. when not IsInWorld)
if (cmpRangeManager->GetLosVisibility(handle, player) == ICmpRangeManager::VIS_HIDDEN)
continue;
CmpPtr<ICmpVisual> cmpVisual(handle);
if (!cmpVisual)
continue;
CVector3D center;
float tmin, tmax;
CBoundingBoxOriented selectionBox = cmpVisual->GetSelectionBox();
if (selectionBox.IsEmpty())
{
if (!allowEditorSelectables)
continue;
// Fall back to using old AABB selection method for decals
// see: http://trac.wildfiregames.com/ticket/1032
CBoundingBoxAligned aABBox = cmpVisual->GetBounds();
if (aABBox.IsEmpty())
continue;
if (!aABBox.RayIntersect(origin, dir, tmin, tmax))
continue;
aABBox.GetCentre(center);
}
else
{
if (!selectionBox.RayIntersect(origin, dir, tmin, tmax))
continue;
center = selectionBox.m_Center;
}
// Find the perpendicular distance from the object's centre to the picker ray
float dist2;
CVector3D closest = origin + dir * (center - origin).Dot(dir);
dist2 = (closest - center).LengthSquared();
hits.push_back(std::make_pair(dist2, ents[i]));
}
// Sort hits by distance
std::sort(hits.begin(), hits.end()); // lexicographic comparison
// Extract the entity IDs
std::vector<entity_id_t> hitEnts;
hitEnts.reserve(hits.size());
for (size_t i = 0; i < hits.size(); ++i)
hitEnts.push_back(hits[i].second);
return hitEnts;
}