我感觉到的是,对开放的GL是如何运作的误解。 你写道,“Platform.cpp制造了这样的物体:”和在法典中,在我能看到你重新创建由开放式GL矩阵中继行动环绕的一些Plattform级的事例之前,我会这样做。 我怀疑您的假设是,开放式利比里亚将在某种程度上“储存”这一“目标”。 www.un.org/Depts/DGACM/index_spanish.htm 这并不是“开放式”公司是如何运作的。 你从图表中重新思考。 开放式自由工并不是一幅画面。
开放式GL是一种图谋。 电话
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0); glVertex2f(x1,y1);
glTexCoord2f(0.0, 1.0); glVertex2f(x2,y2);
glTexCoord2f(1.0, 1.0); glVertex2f(x3,y3);
glTexCoord2f(1.0, 0.0); glVertex2f(x4,y4);
glEnd();
抽到屏幕上。 同样: 页: 1 在这些指挥发出后,这些指挥被开放的利比里亚人民解放联盟带走和遗忘。 开放式过渡矩阵用于改变绘图指令输入数据。 但同样没有坚持不懈。 必须根据所抽出的每个框架发出绘画指挥。 我首先认为,我可以重写你们的一些法典,但是,如果我可以这样说,它需要改写。
典型的开放式计算方案就是这样(我随意排除所有类别和类型定义,并期望对变数、成员和方法名称进行某种常识的解释)。
/* draw_scene is called on every iteration of the program main loop or
the drawing callback handler to update the screen */
void Scene::draw_scene(ScreenInfo si)
{
glViewport(si.viewport.x, si.viewport.y, si.viewport.width, si.viewport.height);
glClearColor(this->clear.r, this->clear.g, this->clear.b, this->clear.a);
glClearDepth(this->clear.d);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDepthMask(GL_TRUE);
glClear( (this->clear.color ? GL_COLOR_BUFFER_BIT) |
(this->clear.depth ? GL_DEPTH_BUFFER_BTT) );
std::list<SceneObjects*> objects_by_distance =
sort_objects_by_direction(scene->objects,
scene->active_camera->position
scene->active_camera->direction);
SceneObjects *closest_object = objects_by_distance.front();
SceneObjects *farthest_object = objects_by_distance.back();
float near_clip = max(NEAR_CLIP_LIMIT,
length(closest_object->position - scene->active_camera->position)
- closest_object->bounding_sphere.radius );
float far_clip = min(FAR_CLIP_LIMIT,
length(farthest_object->position - scene->active_camera->position)
+ farthest_object->bounding_sphere.radius );
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
switch( scene->projection.type ) {
case Projection::perspective: {
gluPerspective( scene->projection.fov,
(float)si.viewport.width/(float)si.viewport.height,
near_clip, far_clip);
} break;
case Projection::orthographic: {
float aspect = (float)si.viewport.width/(float)si.viewport.height;
glOrtho( -0.5 * scene->projection.size * aspect, 0.5 * scene->projection.size * aspect
-0.5 * scene->projection.size 0.5 * scene->projection.size );
} break;
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* I normally disregard using gluLookAt, but in this case I use it
to show as much as possible! */
gluLookAt( scene->active_camera->position.x, scene->active_camera->position.y, scene->active_camera->position.z,
scene->active_camera->position.x + scene->active_camera->direction.x,
scene->active_camera->position.y + scene->active_camera->direction.y,
scene->active_camera->position.z + scene->active_camera->direction.z,
scene->active_camera->up.x, scene->active_camera->up.y, scene->active_camera->up.z );
for_each(scene->objects.begin(), scene->objects.end(), draw_object)
}
void draw_object(SceneObject *object)
{
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glTranslatef(object->position.x, object->position.y, object->position.z);
glRotatef(object->rotation.axis.angle, object->rotation.axis.x, object->rotation.axis.y, object->rotation.axis.z);
GLfloat *(vertex_ptr[3][3]) = object->mesh->vertices;
GLuint *vertex_indices = object->mesh->face_vertex_indices;
#ifdef USE_IMMEDIATE_MODE
glBegin(GL_TRIANGLES);
for(int i = 0; i < object->mesh->face_count; i++) {
glNormalfv(&vertex_ptr[vertex_indices[i]][0]);
glTexCoord3fv(&vertex_ptr[vertex_indices[i]][1]);
glVertex3fv(&vertex_ptr[vertex_indices[i]][2]);
glNormalfv(&vertex_ptr[vertex_indices[i+1]][0]);
glTexCoord3fv(&vertex_ptr[vertex_indices[i+1]][1]);
glVertex3fv(&vertex_ptr[vertex_indices[i+1]][2]);
glNormalfv(&vertex_ptr[vertex_indices[i+2]][0]);
glTexCoord3fv(&vertex_ptr[vertex_indices[i+2]][1]);
glVertex3fv(&vertex_ptr[vertex_indices[i+2]][2]);
}
glEnd();
#else
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
/* This is direct vertex array mode.
A more modern approach is using Vertex Buffer Objects, which reused this
API, but adds further function calls. */
glNormalPointer(GL_FLOAT, 3*3*sizeof(GLfloat), &vertex_ptr[0][0]);
glTexCoordPointer(3, GL_FLOAT, 3*3*sizeof(GLfloat), &vertex_ptr[0][1]);
glVertexPointer(3, GL_FLOAT, 3*3*sizeof(GLfloat), &vertex_ptr[0][2]);
glDrawElements(GL_TRIANGLES, object->mesh->face_count*3, GL_UNSIGNED_INT, vertex_indices);
#endif
glPopMatrix();
}
这是认真使用开放式GL的最基本方法。 我在此详细写道,请你说明如何使用否决权,以及它如何运作。
