void Model::draw(int ranges) const
{
if (!vbuffer)
read_file();
glBindBuffer(GL_ARRAY_BUFFER, vbuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibuffer);
const junk::element& vertex = data_set->get_element("vertex");
bool vertex_array = false;
bool normal_array = false;
bool color_array = false;
BOOST_FOREACH(const junk::attribute& attr, vertex.attributes)
{
if (attr.name == "position")
{
vertex_array = true;
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(attr.size, gl_type(attr.type), size_in_bytes(vertex), (const GLvoid*) attr.offset);
}
else if (attr.name == "normal")
{
normal_array = true;
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(gl_type(attr.type), size_in_bytes(vertex), (const GLvoid*) attr.offset);
}
else if (attr.name == "color")
{
color_array = true;
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(attr.size, gl_type(attr.type), size_in_bytes(vertex), (const GLvoid*) attr.offset);
}
}
std::size_t faces = data_set->get_size("face");
for (int i = 0; i < ranges; ++i)
{
int frag = faces / ranges;
int size = ((i + 1) * (frag + 1) * 3) - (i * frag * 3);
GLvoid* index = (char*) NULL + (i * frag * 3 * sizeof(unsigned int));
set_color(float(i) / float(ranges));
glDrawElements(GL_TRIANGLES, size, GL_UNSIGNED_INT, index);
}
if (vertex_array)
glDisableClientState(GL_VERTEX_ARRAY);
if (normal_array)
glDisableClientState(GL_NORMAL_ARRAY);
if (color_array)
glDisableClientState(GL_COLOR_ARRAY);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
Texture::Texture(uint32_t id, const Texture_description& description) :
OpenGL_object(id),
description_(description),
internal_type_(gl_type(description))
{
description_.dimensions.z = std::max(description.dimensions.z, uint32_t(1));
}
ogl_abstract_texture2d::ogl_abstract_texture2d(unsigned nrows, unsigned ncols, char* buffer)
: nrows_(nrows),
ncols_(ncols),
buffer_(buffer)
{
// Init resource, create texture
glGenTextures(1, &gl_id_);
check_gl_error();
assert(gl_id_);
glBindTexture(GL_TEXTURE_2D, gl_id_);
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glTexImage2D(GL_TEXTURE_2D,
0, GL_RGB, ncols_, nrows_,
0, gl_format(), gl_type(), buffer_);
check_gl_error();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
load();
}
virtual texture
ogl_abstract_texture2d::to_texture()
{
assert(gl_id_);
return texture(ncols_, nrows_, gl_type(), gl_format(), GL_NEAREST, gl_id_);
}
inline GLenum gl_type(ArrayFixed<Image::SampleType,4> x)
{return gl_type(half{});}
