static void solid_bgnd_read(Lib3dsBackground background, Lib3dsIo io)
{
Lib3dsChunk c = new Lib3dsChunk();
Lib3dsChunks chunk;
bool have_lin = false;
lib3ds_chunk_read_start(c, Lib3dsChunks.CHK_SOLID_BGND, io);
while ((chunk = lib3ds_chunk_read_next(c, io)) != 0)
{
switch (chunk)
{
case Lib3dsChunks.CHK_LIN_COLOR_F:
lib3ds_io_read_rgb(io, background.solid_color);
have_lin = true;
break;
case Lib3dsChunks.CHK_COLOR_F:
lib3ds_io_read_rgb(io, background.solid_color);
break;
default: lib3ds_chunk_unknown(chunk, io); break;
}
}
lib3ds_chunk_read_end(c, io);
}
public static void lib3ds_background_read(Lib3dsBackground background, Lib3dsIo io)
{
Lib3dsChunk c = new Lib3dsChunk();
lib3ds_chunk_read(c, io);
switch (c.chunk)
{
case Lib3dsChunks.CHK_BIT_MAP: background.bitmap_name = lib3ds_io_read_string(io, 64); break;
case Lib3dsChunks.CHK_SOLID_BGND:
lib3ds_chunk_read_reset(c, io);
solid_bgnd_read(background, io);
break;
case Lib3dsChunks.CHK_V_GRADIENT:
lib3ds_chunk_read_reset(c, io);
v_gradient_read(background, io);
break;
case Lib3dsChunks.CHK_USE_BIT_MAP: background.use_bitmap = true; break;
case Lib3dsChunks.CHK_USE_SOLID_BGND: background.use_solid = true; break;
case Lib3dsChunks.CHK_USE_V_GRADIENT: background.use_gradient = true; break;
}
}
static void v_gradient_read(Lib3dsBackground background, Lib3dsIo io)
{
Lib3dsChunk c = new Lib3dsChunk();
Lib3dsChunks chunk;
List <float[]> color = new List <float[]>();
List <float[]> lin_color = new List <float[]>();
bool have_lin = false;
lib3ds_chunk_read_start(c, Lib3dsChunks.CHK_V_GRADIENT, io);
background.gradient_percent = lib3ds_io_read_float(io);
lib3ds_chunk_read_tell(c, io);
while ((chunk = lib3ds_chunk_read_next(c, io)) != 0)
{
switch (chunk)
{
case Lib3dsChunks.CHK_COLOR_F:
{
float[] col = new float[3];
lib3ds_io_read_rgb(io, col);
color.Add(col);
}
break;
case Lib3dsChunks.CHK_LIN_COLOR_F:
{
float[] col = new float[3];
lib3ds_io_read_rgb(io, col);
lin_color.Add(col);
have_lin = true;
}
break;
default: lib3ds_chunk_unknown(chunk, io); break;
}
}
if (have_lin)
{
color = lin_color;
}
while (color.Count < 3)
{
color.Add(new float[3]);
}
for (int i = 0; i < 3; i++)
{
background.gradient_top[i] = color[0][i];
background.gradient_middle[i] = color[1][i];
background.gradient_bottom[i] = color[2][i];
}
lib3ds_chunk_read_end(c, io);
}
public static void lib3ds_background_write(Lib3dsBackground background, Lib3dsIo io)
{
if (background.bitmap_name.Length > 0)
{ // ---- LIB3DS_BIT_MAP ----
Lib3dsChunk c = new Lib3dsChunk();
c.chunk = Lib3dsChunks.CHK_BIT_MAP;
c.size = 6 + 1 + (uint)background.bitmap_name.Length;
lib3ds_chunk_write(c, io);
lib3ds_io_write_string(io, background.bitmap_name);
}
if (colorf_defined(background.solid_color))
{ // ---- LIB3DS_SOLID_BGND ----
Lib3dsChunk c = new Lib3dsChunk();
c.chunk = Lib3dsChunks.CHK_SOLID_BGND;
c.size = 42;
lib3ds_chunk_write(c, io);
colorf_write(background.solid_color, io);
}
if (colorf_defined(background.gradient_top) ||
colorf_defined(background.gradient_middle) ||
colorf_defined(background.gradient_bottom))
{ // ---- LIB3DS_V_GRADIENT ----
Lib3dsChunk c = new Lib3dsChunk();
c.chunk = Lib3dsChunks.CHK_V_GRADIENT;
c.size = 118;
lib3ds_chunk_write(c, io);
lib3ds_io_write_float(io, background.gradient_percent);
colorf_write(background.gradient_top, io);
colorf_write(background.gradient_middle, io);
colorf_write(background.gradient_bottom, io);
}
if (background.use_bitmap)
{ // ---- LIB3DS_USE_BIT_MAP ----
Lib3dsChunk c = new Lib3dsChunk();
c.chunk = Lib3dsChunks.CHK_USE_BIT_MAP;
c.size = 6;
lib3ds_chunk_write(c, io);
}
if (background.use_solid)
{ // ---- LIB3DS_USE_SOLID_BGND ----
Lib3dsChunk c = new Lib3dsChunk();
c.chunk = Lib3dsChunks.CHK_USE_SOLID_BGND;
c.size = 6;
lib3ds_chunk_write(c, io);
}
if (background.use_gradient)
{ // ---- LIB3DS_USE_V_GRADIENT ----
Lib3dsChunk c = new Lib3dsChunk();
c.chunk = Lib3dsChunks.CHK_USE_V_GRADIENT;
c.size = 6;
lib3ds_chunk_write(c, io);
}
}
