void Viewport::prepareGC(CL_GraphicContext &p_gc) {
p_gc.push_modelview();
if (m_impl->m_attachPoint != NULL) {
// calculate world clip rect
const int stageWidth = Gfx::Stage::getWidth();
const int stageHeight = Gfx::Stage::getHeight();
m_impl->m_worldClipRect.left =
m_impl->m_attachPoint->x - stageWidth / 2 / m_impl->m_scale;
m_impl->m_worldClipRect.top =
m_impl->m_attachPoint->y - stageHeight / 2 / m_impl->m_scale;
m_impl->m_worldClipRect.right =
m_impl->m_worldClipRect.left + stageWidth / m_impl->m_scale;
m_impl->m_worldClipRect.bottom =
m_impl->m_worldClipRect.top + stageHeight / m_impl->m_scale;
}
// apply new scale
const float horizScale = p_gc.get_width() / m_impl->m_worldClipRect.get_width();
const float vertScale = p_gc.get_height() / m_impl->m_worldClipRect.get_height();
p_gc.mult_scale(horizScale, vertScale);
// apply translations
p_gc.mult_translate(-m_impl->m_worldClipRect.left, -m_impl->m_worldClipRect.top);
}
void ShaderImpl::begin(CL_GraphicContext &p_gc)
{
G_ASSERT(m_initialized);
G_ASSERT(!m_began);
// new texture
m_drawRect = m_parent->getDrawRect(m_boundRect);
m_texture = CL_Texture(p_gc, m_drawRect.get_width(), m_drawRect.get_height());
// attach frame buffer
m_frameBuffer.attach_color_buffer(0, m_texture);
p_gc.set_frame_buffer(m_frameBuffer);
// clear to transparent
p_gc.clear(CL_Colorf::transparent);
// set proper matrix
p_gc.push_modelview();
// get scaling in count
const CL_Mat4f &matrix = p_gc.get_modelview();
const float scaleX = matrix[0];
const float scaleY = matrix[5];
p_gc.mult_translate(-m_drawRect.left / scaleX, -m_drawRect.top / scaleY);
m_began = true;
}
void ExampleText::draw_text(CL_GraphicContext &gc, CL_Texture &texture, CL_Angle angle)
{
gc.set_texture(0, texture);
gc.push_modelview();
gc.mult_translate(gc.get_width()/2.0f, gc.get_height()/2.0f);
gc.mult_rotate(angle, 0.0f, 0.0f, 1.0f);
CL_Draw::texture(gc, CL_Rectf(-300.0f, -300.0f, 300.0f, 300.0f), CL_Colorf(1.0f, 1.0f, 1.0f, 0.7f));
gc.pop_modelview();
gc.reset_texture(0);
}
void Viewport::prepareGC(CL_GraphicContext &p_gc) {
p_gc.push_modelview();
if (m_attachPoint != NULL) {
const int stageWidth = Gfx::Stage::getWidth();
const int stageHeight = Gfx::Stage::getHeight();
m_x = m_attachPoint->x - stageWidth / 2 / m_scale;
m_y = m_attachPoint->y - stageHeight / 2 / m_scale;
m_width = stageWidth / m_scale;
m_height = stageHeight / m_scale;
}
const float horizScale = p_gc.get_width() / m_width;
const float vertScale = p_gc.get_height() / m_height;
p_gc.mult_scale(horizScale, vertScale);
p_gc.mult_translate(-m_x, -m_y);
}
// The start of the Application
int App::start(const std::vector<CL_String> &args)
{
quit = false;
CL_GL1WindowDescription desc;
desc.set_title("ClanLib Object 3D Example");
desc.set_size(CL_Size(640, 480), true);
desc.set_multisampling(4);
desc.set_depth_size(16);
CL_DisplayWindow window(desc);
#ifdef _DEBUG
//struct aiLogStream stream;
//stream = aiGetPredefinedLogStream(aiDefaultLogStream_STDOUT,NULL);
//aiAttachLogStream(&stream);
//stream = aiGetPredefinedLogStream(aiDefaultLogStream_FILE,"assimp_log.txt");
//aiAttachLogStream(&stream);
#endif
// Connect the Window close event
CL_Slot slot_quit = window.sig_window_close().connect(this, &App::on_window_close);
// Connect a keyboard handler to on_key_up()
CL_Slot slot_input_up = (window.get_ic().get_keyboard()).sig_key_up().connect(this, &App::on_input_up);
// Get the graphic context
CL_GraphicContext gc = window.get_gc();
#ifdef USE_OPENGL_1
CL_GraphicContext_GL1 gc_gl1 = gc;
#endif
// Prepare the display
gc.set_map_mode(cl_user_projection);
CL_PolygonRasterizer polygon_rasterizer;
polygon_rasterizer.set_culled(true);
polygon_rasterizer.set_face_cull_mode(cl_cull_back);
polygon_rasterizer.set_front_face(cl_face_side_clockwise);
gc.set_polygon_rasterizer(polygon_rasterizer);
CL_BufferControl buffer_control;
buffer_control.enable_depth_test(true);
buffer_control.set_depth_compare_function(cl_comparefunc_lequal);
buffer_control.enable_depth_write(true);
gc.set_buffer_control(buffer_control);
#ifdef USE_OPENGL_1
// Set the lights
CL_LightModel_GL1 light_model;
light_model.enable_lighting(true);
light_model.set_flat_shading(false);
light_model.set_scene_ambient_light(CL_Colorf(0.2f, 0.2f, 0.2f, 1.0f));
gc_gl1.set_light_model(light_model);
CL_LightSource_GL1 light_distant;
light_distant.set_spot_cutoff(180.0f);
light_distant.set_diffuse_intensity(CL_Colorf(1.0f, 1.0f, 1.0f, 1.0f));
light_distant.set_position(CL_Vec4f(0.0f, -2.0f, 30.0f, 0.0f).normalize3());
gc_gl1.set_light(0, light_distant);
cl1Enable(GL_NORMALIZE);
#endif
#ifdef USE_OPENGL_2
Shader shader(gc);
#endif
// Create the objects
aiSetImportPropertyFloat(AI_CONFIG_PP_GSN_MAX_SMOOTHING_ANGLE,89.53f);
const struct aiScene* scene_teapot = aiImportFile("../Clan3D/Resources/teapot.dae",aiProcessPreset_TargetRealtime_MaxQuality);
if (!scene_teapot)
throw CL_Exception("Cannot load the teapot model");
const struct aiScene* scene_clanlib = aiImportFile("../Clan3D/Resources/clanlib.dae",aiProcessPreset_TargetRealtime_MaxQuality);
if (!scene_clanlib)
throw CL_Exception("Cannot load the clanlib model");
const struct aiScene* scene_tuxball = aiImportFile("../Clan3D/Resources/tux_ball.dae",aiProcessPreset_TargetRealtime_MaxQuality | aiProcess_FlipUVs);
if (!scene_tuxball)
throw CL_Exception("Cannot load the tux ball model");
// Load the texture
CL_Texture tux(gc, "../Clan3D/Resources/tux.png");
float angle = 0.0f;
// Run until someone presses escape
while (!quit)
{
CL_Mat4f perp = CL_Mat4f::perspective(45.0f, ((float) gc.get_width()) / ((float) gc.get_height()), 0.1f, 1000.0f);
gc.set_projection(perp);
gc.clear(CL_Colorf::black);
gc.clear_depth(1.0f);
angle += 1.0f;
if (angle >= 360.0f)
angle -= 360.0f;
#ifdef USE_OPENGL_2
shader.Set(gc);
shader.Use(gc);
#else
gc.set_program_object(cl_program_color_only);
#endif
CL_PrimitivesArray prim_array(gc);
gc.set_modelview(CL_Mat4f::identity());
gc.mult_scale(1.0f,1.0f, -1.0f); // So +'ve Z goes into the screen
gc.mult_translate(0.0f, 0.0f, 2.0f);
gc.mult_rotate(CL_Angle(angle, cl_degrees), 0.0f, 1.0f, 0.0f, false);
gc.push_modelview();
recursive_render(gc, scene_teapot, scene_teapot->mRootNode, false);
gc.pop_modelview();
gc.push_modelview();
gc.mult_scale(0.5f, 0.5f, 0.5f);
gc.mult_translate(0.0f, -0.5f, 0.0f);
recursive_render(gc, scene_clanlib, scene_clanlib->mRootNode, false);
gc.pop_modelview();
#ifdef USE_OPENGL_2
shader.Set(gc, 0);
shader.Use(gc);
#else
gc.set_program_object(cl_program_single_texture);
#endif
gc.set_texture(0, tux);
gc.set_modelview(CL_Mat4f::identity());
gc.mult_scale(1.0f,1.0f, -1.0f); // So +'ve Z goes into the screen
gc.mult_translate(0.7f, 0.5f, 2.0f);
gc.mult_scale(0.05f, 0.05f, 0.05f);
gc.mult_rotate(CL_Angle(angle * 4.0f, cl_degrees), 0.0f, 1.0f, 0.0f, false);
recursive_render(gc, scene_tuxball, scene_tuxball->mRootNode, true);
gc.reset_texture(0);
gc.reset_program_object();
// Flip the display, showing on the screen what we have drawed
// since last call to flip()
window.flip(1);
// This call processes user input and other events
CL_KeepAlive::process();
}
aiReleaseImport(scene_tuxball);
aiReleaseImport(scene_clanlib);
aiReleaseImport(scene_teapot);
aiDetachAllLogStreams();
return 0;
}
void App::recursive_render(CL_GraphicContext &gc, const struct aiScene *sc, const struct aiNode* nd, bool use_texture_coords)
{
int i;
unsigned int n = 0, t;
struct aiMatrix4x4 m = nd->mTransformation;
// update transform
aiTransposeMatrix4(&m);
gc.push_modelview();
gc.mult_modelview((float*)&m);
// draw all meshes assigned to this node
for (; n < nd->mNumMeshes; ++n)
{
const struct aiMesh* mesh = sc->mMeshes[nd->mMeshes[n]];
if (mesh->mNormals == NULL)
throw CL_Exception("This example expects normals to be set");
std::vector<CL_Vec3f> normals;
std::vector<CL_Vec3f> vertices;
std::vector<CL_Vec3f> tex_coords;
normals.reserve(mesh->mNumFaces * 3);
vertices.reserve(mesh->mNumFaces * 3);
if (use_texture_coords)
{
if (mesh->mTextureCoords == NULL || mesh->mTextureCoords[0] == NULL)
throw CL_Exception("This example expects texcoords to be set for this object");
tex_coords.reserve(mesh->mNumFaces * 3);
}
for (t = 0; t < mesh->mNumFaces; ++t)
{
const struct aiFace* face = &mesh->mFaces[t];
if (face->mNumIndices != 3)
throw CL_Exception("This example only supports triangles");
for(i = 0; i < face->mNumIndices; i++)
{
int index = face->mIndices[i];
normals.push_back(&mesh->mNormals[index].x);
vertices.push_back( &mesh->mVertices[index].x);
if (use_texture_coords)
tex_coords.push_back( &mesh->mTextureCoords[0][index].x);
}
}
if (!vertices.empty())
{
CL_PrimitivesArray prim_array(gc);
prim_array.set_attributes(cl_attrib_position, &vertices[0]);
prim_array.set_attribute(cl_attrib_color, CL_Colorf::white);
prim_array.set_attributes(cl_attrib_normal, &normals[0]);
if (use_texture_coords)
prim_array.set_attributes(cl_attrib_texture_position, &tex_coords[0]);
gc.draw_primitives(cl_triangles, vertices.size(), prim_array);
}
}
// draw all children
for (n = 0; n < nd->mNumChildren; ++n)
{
recursive_render(gc, sc, nd->mChildren[n], use_texture_coords);
}
gc.pop_modelview();
}
// The start of the Application
int App::start(const std::vector<CL_String> &args)
{
CL_DisplayWindowDescription win_desc;
win_desc.set_allow_resize(true);
win_desc.set_title("Vertex Buffer Object Example");
win_desc.set_depth_size(16);
win_desc.set_size(CL_Size( 800, 600 ), false);
CL_DisplayWindow window(win_desc);
CL_Slot slot_quit = window.sig_window_close().connect(this, &App::on_window_close);
CL_Slot slot_input_up = (window.get_ic().get_keyboard()).sig_key_up().connect(this, &App::on_input_up);
CL_GraphicContext gc = window.get_gc();
Shader shader(gc);
// Prepare the display
gc.set_map_mode(cl_user_projection);
CL_PolygonRasterizer polygon_rasterizer;
polygon_rasterizer.set_culled(true);
polygon_rasterizer.set_face_cull_mode(cl_cull_back);
polygon_rasterizer.set_front_face(cl_face_side_clockwise);
gc.set_polygon_rasterizer(polygon_rasterizer);
CL_BufferControl buffer_control;
buffer_control.enable_depth_test(true);
buffer_control.set_depth_compare_function(cl_comparefunc_lequal);
buffer_control.enable_depth_write(true);
gc.set_buffer_control(buffer_control);
std::vector<CL_Vec3f> object_positions;
std::vector<CL_Vec3f> object_normals;
std::vector<CL_Vec4f> object_material_ambient;
const int num_cubes = 20000;
object_positions.reserve(num_cubes * 6 * 6); // 6 faces, and 6 vertices per face
object_normals.reserve(num_cubes * 6 * 6);
object_material_ambient.reserve(num_cubes * 6 * 6);
for (int cnt=0; cnt < num_cubes; cnt++)
{
create_cube(object_positions, object_normals, object_material_ambient);
}
CL_VertexArrayBuffer vb_positions(gc, &object_positions[0], sizeof(CL_Vec3f) * object_positions.size());
CL_VertexArrayBuffer vb_normals(gc, &object_normals[0], sizeof(CL_Vec3f) * object_normals.size());
CL_VertexArrayBuffer vb_material_ambient(gc, &object_material_ambient[0], sizeof(CL_Vec4f) * object_material_ambient.size());
// ** Note, at this point "object_positions, object_normals and object_material_ambient"
// ** can be destroyed. But for the purpose of this example, is it kept
CL_Font fps_font(gc, "tahoma", 20);
FramerateCounter frameratecounter;
unsigned int time_last = CL_System::get_time();
float angle = 0.0f;
is_vertex_buffer_on = true;
while (!quit)
{
unsigned int time_now = CL_System::get_time();
float time_diff = (float) (time_now - time_last);
time_last = time_now;
gc.clear(CL_Colorf(0.0f, 0.0f, 0.0f, 1.0f));
gc.clear_depth(1.0f);
gc.set_map_mode(cl_map_2d_upper_left);
CL_String fps = cl_format("%1 fps", frameratecounter.get_framerate());
fps_font.draw_text(gc, gc.get_width() - 100, 30, fps);
CL_String info = cl_format("%1 vertices", (int) object_positions.size());
fps_font.draw_text(gc, 30, 30, info);
fps_font.draw_text(gc, 30, gc.get_height() - 8, "Press any key to toggle the Vertex Buffer option");
if (is_vertex_buffer_on)
{
fps_font.draw_text(gc, 200, 30, "Vertex Buffer = ON");
}
else
{
fps_font.draw_text(gc, 200, 30, "Vertex Buffer = OFF");
}
gc.set_map_mode(cl_user_projection);
CL_Mat4f perp = CL_Mat4f::perspective(45.0f, ((float) gc.get_width()) / ((float) gc.get_height()), 0.1f, 100000.0f);
gc.set_projection(perp);
angle += time_diff / 20.0f;
if (angle >= 360.0f)
angle -= 360.0f;
gc.push_modelview();
gc.set_modelview(CL_Mat4f::identity());
gc.mult_scale(1.0f,1.0f, -1.0f); // So +'ve Z goes into the screen
gc.mult_translate(0.0f, 0.0f, 800.0f);
gc.mult_rotate(CL_Angle(angle*2.0f, cl_degrees), 0.0f, 1.0f, 0.0f, false);
gc.mult_rotate(CL_Angle(angle, cl_degrees), 1.0f, 0.0f, 0.0f, false);
shader.Set(gc);
shader.Use(gc);
CL_PrimitivesArray prim_array(gc);
if (is_vertex_buffer_on)
{
prim_array.set_attributes(0, vb_positions, 3, cl_type_float, (void *) 0);
prim_array.set_attributes(1, vb_normals, 3, cl_type_float, (void *) 0);
prim_array.set_attributes(2, vb_material_ambient, 4, cl_type_float, (void *) 0);
}
else
{
prim_array.set_attributes(0, &object_positions[0]);
prim_array.set_attributes(1, &object_normals[0]);
prim_array.set_attributes(2, &object_material_ambient[0]);
}
gc.draw_primitives(cl_triangles, object_positions.size(), prim_array);
gc.pop_modelview();
gc.reset_program_object();
window.flip(0);
frameratecounter.frame_shown();
CL_KeepAlive::process();
}
return 0;
}
