This example imports a partial scene containing definitions for the camera, a light, and some geometry (a ground plane and a yellow cube). It then creates via the API a red cylinder as a polygon mesh and tessellates a copy of it.
#include "example_shared.h"
#include "example_render_target_simple.h"
#include <iostream>
class Cylinder
{
public:
: m_n( n), m_radius( radius), m_height( height)
{
m_normal_connectivity =
new mi::Uint32[ 2*n + 4*n];
m_offsets[0] = 0;
m_offsets[1] = n;
m_offsets[2+i] = 2*n + 4*i;
m_mesh_connectivity[index++] = 2*i;
m_mesh_connectivity[index++] = 2*i+1;
m_mesh_connectivity[index++] = 2*i;
m_mesh_connectivity[index++] = (2*i + 2) % (2*n);
m_mesh_connectivity[index++] = (2*i + 3) % (2*n);
m_mesh_connectivity[index++] = (2*i + 1) % (2*n);
}
index = 0;
m_normal_connectivity[index++] = 0;
m_normal_connectivity[index++] = 1;
m_normal_connectivity[index++] = 2 + i;
m_normal_connectivity[index++] = 2 + (i+1) % n;
m_normal_connectivity[index++] = 2 + (i+1) % n;
m_normal_connectivity[index++] = 2 + i;
}
}
~Cylinder()
{
delete[] m_mesh_connectivity;
delete[] m_normal_connectivity;
delete[] m_offsets;
}
mi::Uint32 num_normals()
const {
return m_n + 2; }
{
if( index % 2 == 0)
else
}
{
}
private:
};
{
Cylinder cylinder( n, radius, height);
check_success( mesh);
for(
mi::Uint32 i = 0; i < cylinder.num_points(); ++i)
for(
mi::Uint32 i = 0; i < cylinder.num_polys(); ++i)
for(
mi::Uint32 i = 0; i < cylinder.num_polys(); ++i)
mesh_connectivity->set_polygon_indices(
for(
mi::Uint32 i = 0; i < cylinder.num_polys(); ++i)
normal_connectivity->set_polygon_indices(
for(
mi::Uint32 i = 0; i < cylinder.num_normals(); ++i)
normals->append_vector3( cylinder.normal( i));
check_success( normals->is_valid_attribute());
check_success( normal_connectivity->attach_attribute_vector( normals.get()) == 0);
check_success( !normals->is_valid_attribute());
return mesh;
}
{
transaction, 23, cylinder_radius, cylinder_height));
transaction->
store( mesh_red.get(),
"mesh_red");
instance->attach( "mesh_red");
matrix.translate( -0.1, -cylinder_radius, 0.2);
matrix.rotate( 0.0, -0.5 *
MI_PI_2, 0.0);
instance->set_matrix( matrix);
instance->create_attribute<
mi::IBoolean>(
"visible",
"Boolean"));
visible->set_value( true);
material->set_reference( "red_material");
transaction->
store( instance.get(),
"instance_red");
group->attach( "instance_red");
tessellator->run( c_mesh_red.get()));
transaction->
store( m_mesh_blue.get(),
"mesh_blue");
instance->
attach(
"mesh_blue");
matrix.translate( -1.1, -cylinder_radius, -1.1);
instance->set_matrix( matrix);
visible = instance->create_attribute<
mi::IBoolean>(
"visible",
"Boolean");
ref->set_reference( "blue_material");
transaction->
store( instance.get(),
"instance_blue");
group->attach( "instance_blue");
}
{
check_success( rc->add_mdl_path( mdl_path) == 0);
check_success( rc->add_mdl_path( ".") == 0);
}
{
check_success( database.is_valid_interface());
database->get_global_scope());
scope->create_transaction());
check_success( transaction.is_valid_interface());
check_success( import_api.is_valid_interface());
import_api->import_elements( transaction.get(), "file:main.mi"));
check_success( import_result->get_error_number() == 0);
setup_scene( transaction.get(), import_result->get_rootgroup());
scene->set_rootgroup( import_result->get_rootgroup());
scene->set_options( import_result->get_options());
scene->set_camera_instance( import_result->get_camera_inst());
transaction->
store( scene.get(),
"the_scene");
scene->create_render_context( transaction.get(), "iray"));
check_success( render_context.is_valid_interface());
scheduler_mode->set_c_str( "batch");
render_context->set_option( "scheduler_mode", scheduler_mode.get());
scene = 0;
new Render_target( image_api.get(), "Color", 512, 384));
check_success( render_context->render( transaction.get(), render_target.get(), 0) >= 0);
check_success( export_api.is_valid_interface());
export_api->export_canvas( "file:example_polygon_mesh.png", canvas.get());
}
int main( int argc, char* argv[])
{
if( argc != 2) {
std::cerr << "Usage: example_polygon_mesh <mdl_path>" << std::endl;
keep_console_open();
return EXIT_FAILURE;
}
const char* mdl_path = argv[1];
check_success( neuray.is_valid_interface());
configuration( neuray.get(), mdl_path);
check_start_success( result);
rendering( neuray.get());
check_success( neuray->
shutdown() == 0);
neuray = 0;
check_success( unload());
keep_console_open();
return EXIT_SUCCESS;
}
This interface represents bool.
Definition: inumber.h:122
virtual void set_value(bool val)=0
Sets the value of the object via a parameter of type bool.
A reference is an object that acts as a pointer to other database elements.
Definition: iref.h:25
A simple string class.
Definition: istring.h:22
Handle class template for interfaces, automatizing the lifetime control via reference counting.
Definition: handle.h:113
NxM-dimensional matrix class template of fixed dimensions.
Definition: matrix.h:367
Fixed-size math vector class template with generic operations.
Definition: vector.h:286
This interface is used to interact with the distributed database.
Definition: idatabase.h:293
This interface is used to export files.
Definition: iexport_api.h:38
A group is a container for other scene elements.
Definition: igroup.h:39
This interface provides various utilities related to canvases and buffers.
Definition: iimage_api.h:49
This interface is used to import files.
Definition: iimport_api.h:100
An instance is a scene element that adds a transformation and attributes to another scene element.
Definition: iinstance.h:117
virtual Sint32 attach(const char *scene_element)=0
Attaches a scene element to the instance.
This is an object representing the Iray library.
Definition: ineuray.h:44
virtual Sint32 shutdown(bool blocking=true)=0
Shuts down the library.
virtual base::IInterface * get_api_component(const base::Uuid &uuid) const =0
Returns an API component from the Iray SDK API.
virtual Sint32 start(bool blocking=true)=0
Starts the operation of the Iray library.
This interface is used to load plugins and to query information about loaded plugins.
Definition: iplugin_configuration.h:24
Interface representing a polygon mesh.
Definition: ipolygon_mesh.h:128
virtual Uint32 append_point(const Float32_3_struct &p)=0
Adds a point p to the end of all points and returns the index of the new point.
virtual IPolygon_connectivity * create_connectivity(Connectivity_map_type map_type=CONNECTIVITY_MAP_GENERIC)=0
Creates a new connectivity for non-per-primitive attributes.
virtual Sint32 attach_connectivity(IPolygon_connectivity *connectivity)=0
Attaches a given connectivity to the mesh.
virtual Polygon_handle_struct add_polygon(Uint32 num_vertices, bool hole=false)=0
Adds a polygon to the mesh.
virtual Sint32 attach_mesh_connectivity(IPolygon_connectivity *connectivity)=0
Attaches the mesh connectivity to the mesh.
virtual IPolygon_connectivity * edit_mesh_connectivity()=0
Detaches and returns the mesh connectivity.
virtual void reserve_points(Uint32 n)=0
Reserves space for at least n points.
This interface is used to query and change the rendering configuration.
Definition: irendering_configuration.h:109
The scene is the top-level element describing a subset of DB elements to be rendered.
Definition: iscene.h:44
Functor to tessellate a polygon mesh into a triangle mesh.
Definition: itessellator.h:33
A transaction provides a consistent view on the database.
Definition: itransaction.h:81
virtual const base::IInterface * access(const char *name)=0
Retrieves an element from the database.
virtual base::IInterface * create(const char *type_name, Uint32 argc=0, const base::IInterface *argv[]=0)=0
Creates an object of the type type_name.
virtual base::IInterface * edit(const char *name)=0
Retrieves an element from the database and returns it ready for editing.
virtual Sint32 commit()=0
Commits the transaction.
virtual Sint32 store(base::IInterface *db_element, const char *name, Uint8 privacy=LOCAL_SCOPE)=0
Stores the element db_element in the database under the name name and with the privacy level privacy.
Handle class for type-safety.
Definition: identifier.h:66
#define MI_BASE_DLL_FILE_EXT
The operating system specific default filename extension for shared libraries (DLLs)
Definition: config.h:340
unsigned int Uint32
32-bit unsigned integer.
Definition: types.h:49
#define MI_PI_2
Value of Pi / 2.
Definition: types.h:194
float Float32
32-bit float.
Definition: types.h:51
#define MI_PI
Value of Pi.
Definition: types.h:192
signed int Sint32
32-bit signed integer.
Definition: types.h:46
Color sin(const Color &c)
Returns a color with the elementwise sine of the color c.
Definition: color.h:764
Color cos(const Color &c)
Returns a color with the elementwise cosine of the color c.
Definition: color.h:561
math::Vector<Float32, 3> Float32_3
Vector of three Float32.
Definition: vector_typedefs.h:90
math::Matrix<Float64, 4, 4> Float64_4_4
4 x 4 matrix of Float64.
Definition: matrix_typedefs.h:330
@ ATTR_NORMAL
Surface normals of type mi::Float32_3 per point or per vertex.
Definition: iattribute_vector.h:65