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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains declarations for the DrawContext class. This class
// contains two pre-defined Parameters: o3d.view, for the viewing
// matrix, and o3d.projection, for the projection matrix. There
// are convenience funtions for accessing these without looking them up
// by name. These matrices are used by StandardParamMatrix4s, to implement
// the SAS transform semantics. In addition, any user-defined
// parameters added to the DrawContext will be made "global", ie.,
// linked to all Shapes containing parameters of the same name, by
// Node::GenerateRenderTreeGroup().
#ifndef O3D_CORE_CROSS_DRAW_CONTEXT_H_
#define O3D_CORE_CROSS_DRAW_CONTEXT_H_
#include "core/cross/param_object.h"
namespace o3d {
class DrawContext : public ParamObject {
public:
typedef SmartPointer<DrawContext> Ref;
typedef WeakPointer<DrawContext> WeakPointerType;
static const char* kViewParamName;
static const char* kProjectionParamName;
// Gets the view matrix.
const Matrix4 view() const {
return view_param_->value();
}
// Sets the view matrix.
void set_view(const Matrix4& value) {
view_param_->set_value(value);
}
// Gets the projection matrix.
const Matrix4 projection() const {
return projection_param_->value();
}
// Sets the projection matrix.
void set_projection(const Matrix4& value) {
projection_param_->set_value(value);
}
// Gets a weak pointer to us.
WeakPointerType GetWeakPointer() const {
return weak_pointer_manager_.GetWeakPointer();
}
private:
explicit DrawContext(ServiceLocator* service_locator);
friend class IClassManager;
static ObjectBase::Ref Create(ServiceLocator* service_locator);
// Predefined view matrix parameter.
ParamMatrix4::Ref view_param_;
// Predefined projection matrix parameter.
ParamMatrix4::Ref projection_param_;
// Manager for weak pointers to us.
WeakPointerType::WeakPointerManager weak_pointer_manager_;
O3D_DECL_CLASS(DrawContext, ParamObject)
DISALLOW_COPY_AND_ASSIGN(DrawContext);
};
class ParamDrawContext : public TypedRefParam<DrawContext> {
public:
typedef SmartPointer<ParamDrawContext> Ref;
ParamDrawContext(ServiceLocator* service_locator,
bool dynamic,
bool read_only)
: TypedRefParam<DrawContext>(service_locator, dynamic, read_only) {}
private:
friend class IClassManager;
static ObjectBase::Ref Create(ServiceLocator* service_locator);
O3D_DECL_CLASS(ParamDrawContext, RefParamBase)
};
} // namespace o3d
#endif // O3D_CORE_CROSS_DRAW_CONTEXT_H_
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