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SFML OpenGL - Sześcian - face pod kursorem » 2026-04-24 20:28:41 Cześć. Piszę program w SFML 3.0.2 z wykorzystaniem OpenGL. Udało mi się wygenerować sześcian. Chciałbym teraz podświetlić ścianę na która wskazuje kursor. Chodzi mi o wyznaczanie trójkąta, bo planuję wykorzystać ten algorytm również do zaznaczania płaskich sześciokątów. Mam taki kod na mesh i model  Mesh3D#include "Mesh3D.hpp"
#include <SFML/OpenGL.hpp>
#include "Window.hpp"
#include <iostream>
#include "Cursor.hpp"
Mesh3D::Mesh3D() {
}
Mesh3D::~Mesh3D() {
}
void Mesh3D::setTexture( std::shared_ptr < Texture > texture ) {
_texture = texture;
}
void Mesh3D::draw( float x, float y, float z, float rx, float ry, float rz ) {
glPushMatrix();
glTranslatef( x, y, z );
glRotatef( rx, 1.f, 0.f, 0.f );
glRotatef( ry, 0.f, 1.f, 0.f );
glRotatef( rz, 0.f, 0.f, 1.f );
glEnable( GL_TEXTURE_2D );
glColor3f( 1.0f, 1.0f, 1.0f );
glBindTexture( GL_TEXTURE_2D, _texture ? _texture->_texture->getNativeHandle()
: 0 );
glBegin( GL_TRIANGLES );
for( auto & vertex: _vertices ) {
glNormal3f( vertex._nx, vertex._ny, vertex._nz );
glTexCoord2f( vertex._u, 1.0f - vertex._v );
glVertex3f( vertex._x, vertex._y, vertex._z );
}
glEnd();
glBindTexture( GL_TEXTURE_2D, 0 );
glPopMatrix();
}
std::shared_ptr < Mesh3D > generateCube( float size ) {
std::shared_ptr < Mesh3D > cube = std::make_shared < Mesh3D >();
cube->_vertices.emplace_back( - size, - size, size, 0.f, 0.f, 1.f, 0.f, 0.f );
cube->_vertices.emplace_back( size, - size, size, 0.f, 0.f, 1.f, 1.f, 0.f );
cube->_vertices.emplace_back( size, size, size, 0.f, 0.f, 1.f, 1.f, 1.f );
cube->_vertices.emplace_back( - size, - size, size, 0.f, 0.f, 1.f, 0.f, 0.f );
cube->_vertices.emplace_back( size, size, size, 0.f, 0.f, 1.f, 1.f, 1.f );
cube->_vertices.emplace_back( - size, size, size, 0.f, 0.f, 1.f, 0.f, 1.f );
cube->_vertices.emplace_back( - size, - size, - size, 0.f, 0.f, - 1.f, 1.f, 0.f );
cube->_vertices.emplace_back( size, - size, - size, 0.f, 0.f, - 1.f, 0.f, 0.f );
cube->_vertices.emplace_back( size, size, - size, 0.f, 0.f, - 1.f, 0.f, 1.f );
cube->_vertices.emplace_back( - size, - size, - size, 0.f, 0.f, - 1.f, 1.f, 0.f );
cube->_vertices.emplace_back( size, size, - size, 0.f, 0.f, - 1.f, 0.f, 1.f );
cube->_vertices.emplace_back( - size, size, - size, 0.f, 0.f, - 1.f, 1.f, 1.f );
cube->_vertices.emplace_back( - size, - size, - size, - 1., 0., 0., 0., 0. );
cube->_vertices.emplace_back( - size, - size, size, - 1., 0., 0., 1., 0. );
cube->_vertices.emplace_back( - size, size, size, - 1., 0., 0., 1., 1. );
cube->_vertices.emplace_back( - size, - size, - size, - 1., 0., 0., 0., 0. );
cube->_vertices.emplace_back( - size, size, size, - 1., 0., 0., 1., 1. );
cube->_vertices.emplace_back( - size, size, - size, - 1., 0., 0., 0., 1. );
cube->_vertices.emplace_back( size, - size, - size, 1., 0., 0., 1., 0. );
cube->_vertices.emplace_back( size, - size, size, 1., 0., 0., 0., 0. );
cube->_vertices.emplace_back( size, size, size, 1., 0., 0., 0., 1. );
cube->_vertices.emplace_back( size, - size, - size, 1., 0., 0., 1., 0. );
cube->_vertices.emplace_back( size, size, size, 1., 0., 0., 0., 1. );
cube->_vertices.emplace_back( size, size, - size, 1., 0., 0., 1., 1. );
cube->_vertices.emplace_back( - size, size, - size, 0., 1., 0., 0., 1. );
cube->_vertices.emplace_back( - size, size, size, 0., 1., 0., 0., 0. );
cube->_vertices.emplace_back( size, size, size, 0., 1., 0., 1., 0. );
cube->_vertices.emplace_back( - size, size, - size, 0., 1., 0., 0., 1. );
cube->_vertices.emplace_back( size, size, size, 0., 1., 0., 1., 0. );
cube->_vertices.emplace_back( size, size, - size, 0., 1., 0., 1., 1. );
cube->_vertices.emplace_back( - size, - size, - size, 0., - 1., 0., 1., 1. );
cube->_vertices.emplace_back( - size, - size, size, 0., - 1., 0., 1., 0. );
cube->_vertices.emplace_back( size, - size, size, 0., - 1., 0., 0., 0. );
cube->_vertices.emplace_back( - size, - size, - size, 0., - 1., 0., 1., 1. );
cube->_vertices.emplace_back( size, - size, size, 0., - 1., 0., 0., 0. );
cube->_vertices.emplace_back( size, - size, - size, 0., - 1., 0., 0., 1. );
return cube;
} #include "Model3D.hpp"
Model3D::Model3D( float x, float y, float z, float rx, float ry, float rz ) {
_x = x;
_y = y;
_z = z;
_rx = rx;
_ry = ry;
_rz = rz;
_meshes.clear();
std::shared_ptr < Mesh3D > cubeMesh = generateCube( 0.5f );
cubeMesh->setTexture( getTexture( L"tex\\logo.png" ) );
_meshes.push_back( cubeMesh );
}
Model3D::~Model3D() {
}
void Model3D::draw() {
for( auto & mesh: _meshes ) {
mesh->draw( _x, _y, _z, _rx, _ry, _rz );
}
}
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