assimp/code/AssetLib/AMF/AMFImporter_Material.cpp

328 lines
12 KiB
C++

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/// \file AMFImporter_Material.cpp
/// \brief Parsing data from material nodes.
/// \date 2016
/// \author smal.root@gmail.com
#ifndef ASSIMP_BUILD_NO_AMF_IMPORTER
#include "AMFImporter.hpp"
namespace Assimp {
// <color
// profile="" - The ICC color space used to interpret the three color channels <r>, <g> and <b>.
// >
// </color>
// A color definition.
// Multi elements - No.
// Parent element - <material>, <object>, <volume>, <vertex>, <triangle>.
//
// "profile" can be one of "sRGB", "AdobeRGB", "Wide-Gamut-RGB", "CIERGB", "CIELAB", or "CIEXYZ".
// Children elements:
// <r>, <g>, <b>, <a>
// Multi elements - No.
// Red, Greed, Blue and Alpha (transparency) component of a color in sRGB space, values ranging from 0 to 1. The
// values can be specified as constants, or as a formula depending on the coordinates.
void AMFImporter::ParseNode_Color(XmlNode &node) {
if (node.empty()) {
return;
}
const std::string &profile = node.attribute("profile").as_string();
bool read_flag[4] = { false, false, false, false };
AMFNodeElementBase *ne = new AMFColor(mNodeElement_Cur);
AMFColor &als = *((AMFColor *)ne); // alias for convenience
ParseHelper_Node_Enter(ne);
for (pugi::xml_node &child : node.children()) {
// create new color object.
als.Profile = profile;
const std::string &name = child.name();
if ( name == "r") {
read_flag[0] = true;
XmlParser::getValueAsFloat(child, als.Color.r);
} else if (name == "g") {
read_flag[1] = true;
XmlParser::getValueAsFloat(child, als.Color.g);
} else if (name == "b") {
read_flag[2] = true;
XmlParser::getValueAsFloat(child, als.Color.b);
} else if (name == "a") {
read_flag[3] = true;
XmlParser::getValueAsFloat(child, als.Color.a);
}
// check if <a> is absent. Then manually add "a == 1".
if (!read_flag[3]) {
als.Color.a = 1;
}
}
als.Composed = false;
mNodeElement_List.push_back(ne); // and to node element list because its a new object in graph.
ParseHelper_Node_Exit();
// check that all components was defined
if (!(read_flag[0] && read_flag[1] && read_flag[2])) {
throw DeadlyImportError("Not all color components are defined.");
}
}
// <material
// id="" - A unique material id. material ID "0" is reserved to denote no material (void) or sacrificial material.
// >
// </material>
// An available material.
// Multi elements - Yes.
// Parent element - <amf>.
void AMFImporter::ParseNode_Material(XmlNode &node) {
// create new object and assign read data
std::string id = node.attribute("id").as_string();
AMFNodeElementBase *ne = new AMFMaterial(mNodeElement_Cur);
((AMFMaterial*)ne)->ID = id;
// Check for child nodes
if (!node.empty()) {
ParseHelper_Node_Enter(ne);
for (pugi::xml_node &child : node.children()) {
const std::string name = child.name();
if (name == "color") {
ParseNode_Color(child);
} else if (name == "metadata") {
ParseNode_Metadata(child);
}
}
ParseHelper_Node_Exit();
} else {
mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
}
mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}
// <texture
// id="" - Assigns a unique texture id for the new texture.
// width="" - Width (horizontal size, x) of the texture, in pixels.
// height="" - Height (lateral size, y) of the texture, in pixels.
// depth="" - Depth (vertical size, z) of the texture, in pixels.
// type="" - Encoding of the data in the texture. Currently allowed values are "grayscale" only. In grayscale mode, each pixel is represented by one byte
// in the range of 0-255. When the texture is referenced using the tex function, these values are converted into a single floating point number in the
// range of 0-1 (see Annex 2). A full color graphics will typically require three textures, one for each of the color channels. A graphic involving
// transparency may require a fourth channel.
// tiled="" - If true then texture repeated when UV-coordinates is greater than 1.
// >
// </triangle>
// Specifies an texture data to be used as a map. Lists a sequence of Base64 values specifying values for pixels from left to right then top to bottom,
// then layer by layer.
// Multi elements - Yes.
// Parent element - <amf>.
void AMFImporter::ParseNode_Texture(XmlNode &node) {
const std::string id = node.attribute("id").as_string();
const uint32_t width = node.attribute("width").as_uint();
const uint32_t height = node.attribute("height").as_uint();
uint32_t depth = node.attribute("depth").as_uint();
const std::string type = node.attribute("type").as_string();
bool tiled = node.attribute("tiled").as_bool();
if (node.empty()) {
return;
}
// create new texture object.
AMFNodeElementBase *ne = new AMFTexture(mNodeElement_Cur);
AMFTexture& als = *((AMFTexture*)ne);// alias for convenience
std::string enc64_data;
XmlParser::getValueAsString(node, enc64_data);
// Check for child nodes
// check that all components was defined
if (id.empty()) {
throw DeadlyImportError("ID for texture must be defined.");
}
if (width < 1) {
throw DeadlyImportError("Invalid width for texture.");
}
if (height < 1) {
throw DeadlyImportError("Invalid height for texture.");
}
if (type != "grayscale") {
throw DeadlyImportError("Invalid type for texture.");
}
if (enc64_data.empty()) {
throw DeadlyImportError("Texture data not defined.");
}
// copy data
als.ID = id;
als.Width = width;
als.Height = height;
als.Depth = depth;
als.Tiled = tiled;
ParseHelper_Decode_Base64(enc64_data, als.Data);
if (depth == 0) {
depth = (uint32_t)(als.Data.size() / (width * height));
}
// check data size
if ((width * height * depth) != als.Data.size()) {
throw DeadlyImportError("Texture has incorrect data size.");
}
mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}
// <texmap
// rtexid="" - Texture ID for red color component.
// gtexid="" - Texture ID for green color component.
// btexid="" - Texture ID for blue color component.
// atexid="" - Texture ID for alpha color component. Optional.
// >
// </texmap>, old name: <map>
// Specifies texture coordinates for triangle.
// Multi elements - No.
// Parent element - <triangle>.
// Children elements:
// <utex1>, <utex2>, <utex3>, <vtex1>, <vtex2>, <vtex3>. Old name: <u1>, <u2>, <u3>, <v1>, <v2>, <v3>.
// Multi elements - No.
// Texture coordinates for every vertex of triangle.
void AMFImporter::ParseNode_TexMap(XmlNode &node, const bool pUseOldName) {
// Read attributes for node <color>.
AMFNodeElementBase *ne = new AMFTexMap(mNodeElement_Cur);
AMFTexMap &als = *((AMFTexMap *)ne); //
std::string rtexid, gtexid, btexid, atexid;
if (!node.empty()) {
for (pugi::xml_attribute &attr : node.attributes()) {
const std::string &currentAttr = attr.name();
if (currentAttr == "rtexid") {
rtexid = attr.as_string();
} else if (currentAttr == "gtexid") {
gtexid = attr.as_string();
} else if (currentAttr == "btexid") {
btexid = attr.as_string();
} else if (currentAttr == "atexid") {
atexid = attr.as_string();
}
}
}
// create new texture coordinates object, alias for convenience
// check data
if (rtexid.empty() && gtexid.empty() && btexid.empty()) {
throw DeadlyImportError("ParseNode_TexMap. At least one texture ID must be defined.");
}
// Check for children nodes
if (node.children().begin() == node.children().end()) {
throw DeadlyImportError("Invalid children definition.");
}
// read children nodes
bool read_flag[6] = { false, false, false, false, false, false };
if (!pUseOldName) {
ParseHelper_Node_Enter(ne);
for ( XmlNode &currentNode : node.children()) {
const std::string &name = currentNode.name();
if (name == "utex1") {
read_flag[0] = true;
XmlParser::getValueAsFloat(node, als.TextureCoordinate[0].x);
} else if (name == "utex2") {
read_flag[1] = true;
XmlParser::getValueAsFloat(node, als.TextureCoordinate[1].x);
} else if (name == "utex3") {
read_flag[2] = true;
XmlParser::getValueAsFloat(node, als.TextureCoordinate[2].x);
} else if (name == "vtex1") {
read_flag[3] = true;
XmlParser::getValueAsFloat(node, als.TextureCoordinate[0].y);
} else if (name == "vtex2") {
read_flag[4] = true;
XmlParser::getValueAsFloat(node, als.TextureCoordinate[1].y);
} else if (name == "vtex3") {
read_flag[5] = true;
XmlParser::getValueAsFloat(node, als.TextureCoordinate[2].y);
}
}
ParseHelper_Node_Exit();
} else {
for (pugi::xml_attribute &attr : node.attributes()) {
const std::string name = attr.name();
if (name == "u") {
read_flag[0] = true;
als.TextureCoordinate[0].x = attr.as_float();
} else if (name == "u2") {
read_flag[1] = true;
als.TextureCoordinate[1].x = attr.as_float();
} else if (name == "u3") {
read_flag[2] = true;
als.TextureCoordinate[2].x = attr.as_float();
} else if (name == "v1") {
read_flag[3] = true;
als.TextureCoordinate[0].y = attr.as_float();
} else if (name == "v2") {
read_flag[4] = true;
als.TextureCoordinate[1].y = attr.as_float();
} else if (name == "v3") {
read_flag[5] = true;
als.TextureCoordinate[0].y = attr.as_float();
}
}
}
// check that all components was defined
if (!(read_flag[0] && read_flag[1] && read_flag[2] && read_flag[3] && read_flag[4] && read_flag[5])) {
throw DeadlyImportError("Not all texture coordinates are defined.");
}
// copy attributes data
als.TextureID_R = rtexid;
als.TextureID_G = gtexid;
als.TextureID_B = btexid;
als.TextureID_A = atexid;
mNodeElement_List.push_back(ne);
}
}// namespace Assimp
#endif // !ASSIMP_BUILD_NO_AMF_IMPORTER