204 lines
7.0 KiB
Java
204 lines
7.0 KiB
Java
package io.github.hydos.ginger.engine.obj.normals;
|
|
|
|
import java.util.List;
|
|
|
|
import org.joml.Vector2f;
|
|
import org.joml.Vector3f;
|
|
|
|
import io.github.hydos.ginger.engine.math.Maths;
|
|
import io.github.hydos.ginger.engine.render.models.RawModel;
|
|
|
|
public class NormalMappedObjLoader
|
|
{
|
|
public static RawModel loadOBJ(String objFileName)
|
|
{
|
|
// BufferedReader isr = null;
|
|
// isr = new BufferedReader(new InputStreamReader(Class.class.getResourceAsStream("/models/" + objFileName)));
|
|
// BufferedReader reader = new BufferedReader(isr);
|
|
// String line;
|
|
// List<VertexNM> vertices = new ArrayList<VertexNM>();
|
|
// List<Vector2f> textures = new ArrayList<Vector2f>();
|
|
// List<Vector3f> normals = new ArrayList<Vector3f>();
|
|
// List<Integer> indices = new ArrayList<Integer>();
|
|
// try
|
|
// {
|
|
// while (true)
|
|
// {
|
|
// line = reader.readLine();
|
|
// if (line.startsWith("v "))
|
|
// {
|
|
// String[] currentLine = line.split(" ");
|
|
// Vector3f vertex = new Vector3f(Float.valueOf(currentLine[1]),
|
|
// Float.valueOf(currentLine[2]),
|
|
// Float.valueOf(currentLine[3]));
|
|
// VertexNM newVertex = new VertexNM(vertices.size(), vertex);
|
|
// vertices.add(newVertex);
|
|
// }
|
|
// else if (line.startsWith("vt "))
|
|
// {
|
|
// String[] currentLine = line.split(" ");
|
|
// Vector2f texture = new Vector2f(Float.valueOf(currentLine[1]),
|
|
// Float.valueOf(currentLine[2]));
|
|
// textures.add(texture);
|
|
// }
|
|
// else if (line.startsWith("vn "))
|
|
// {
|
|
// String[] currentLine = line.split(" ");
|
|
// Vector3f normal = new Vector3f(Float.valueOf(currentLine[1]),
|
|
// Float.valueOf(currentLine[2]),
|
|
// Float.valueOf(currentLine[3]));
|
|
// normals.add(normal);
|
|
// }
|
|
// else if (line.startsWith("f "))
|
|
// { break; }
|
|
// }
|
|
// while (line != null && line.startsWith("f "))
|
|
// {
|
|
// String[] currentLine = line.split(" ");
|
|
// String[] vertex1 = currentLine[1].split("/");
|
|
// String[] vertex2 = currentLine[2].split("/");
|
|
// String[] vertex3 = currentLine[3].split("/");
|
|
// VertexNM v0 = processVertex(vertex1, vertices, indices);
|
|
// VertexNM v1 = processVertex(vertex2, vertices, indices);
|
|
// VertexNM v2 = processVertex(vertex3, vertices, indices);
|
|
// calculateTangents(v0, v1, v2, textures);//NEW
|
|
// line = reader.readLine();
|
|
// }
|
|
// reader.close();
|
|
// }
|
|
// catch (IOException e)
|
|
// {
|
|
// System.err.println("Error reading the file");
|
|
// }
|
|
// removeUnusedVertices(vertices);
|
|
// float[] verticesArray = new float[vertices.size() * 3];
|
|
// float[] texturesArray = new float[vertices.size() * 2];
|
|
// float[] normalsArray = new float[vertices.size() * 3];
|
|
// float[] tangentsArray = new float[vertices.size() * 3];
|
|
// @SuppressWarnings("unused")
|
|
// //some weird eclipse only error here i think
|
|
// float furthest = convertDataToArrays(vertices, textures, normals, verticesArray,
|
|
// texturesArray, normalsArray, tangentsArray);
|
|
// int[] indicesArray = convertIndicesListToArray(indices);
|
|
// return Loader.loadToVAO(verticesArray, indicesArray, normalsArray, tangentsArray, texturesArray);
|
|
return null;
|
|
}
|
|
|
|
private static void calculateTangents(VertexNM v0, VertexNM v1, VertexNM v2, List<Vector2f> textures)
|
|
{
|
|
Vector3f delatPos1 = new Vector3f().sub(v1.getPosition(), v0.getPosition());
|
|
Vector3f delatPos2 = new Vector3f().sub(v2.getPosition(), v0.getPosition());
|
|
Vector2f uv0 = textures.get(v0.getTextureIndex());
|
|
Vector2f uv1 = textures.get(v1.getTextureIndex());
|
|
Vector2f uv2 = textures.get(v2.getTextureIndex());
|
|
Vector2f deltaUv1 = new Vector2f().sub(uv1, uv0);
|
|
Vector2f deltaUv2 = new Vector2f().sub(uv2, uv0);
|
|
float r = 1.0f / (deltaUv1.x * deltaUv2.y - deltaUv1.y * deltaUv2.x);
|
|
Maths.scale(delatPos1, deltaUv2.y);
|
|
Maths.scale(delatPos2, deltaUv1.y);
|
|
Vector3f tangent = new Vector3f().sub(delatPos1, delatPos2);
|
|
Maths.scale(tangent, r);
|
|
v0.addTangent(tangent);
|
|
v1.addTangent(tangent);
|
|
v2.addTangent(tangent);
|
|
}
|
|
|
|
private static VertexNM processVertex(String[] vertex, List<VertexNM> vertices, List<Integer> indices)
|
|
{
|
|
int index = Integer.parseInt(vertex[0]) - 1;
|
|
VertexNM currentVertex = vertices.get(index);
|
|
int textureIndex = Integer.parseInt(vertex[1]) - 1;
|
|
int normalIndex = Integer.parseInt(vertex[2]) - 1;
|
|
if (!currentVertex.isSet())
|
|
{
|
|
currentVertex.setTextureIndex(textureIndex);
|
|
currentVertex.setNormalIndex(normalIndex);
|
|
indices.add(index);
|
|
return currentVertex;
|
|
}
|
|
else
|
|
{
|
|
return dealWithAlreadyProcessedVertex(currentVertex, textureIndex, normalIndex, indices,
|
|
vertices);
|
|
}
|
|
}
|
|
|
|
private static int[] convertIndicesListToArray(List<Integer> indices)
|
|
{
|
|
int[] indicesArray = new int[indices.size()];
|
|
for (int i = 0; i < indicesArray.length; i++)
|
|
{ indicesArray[i] = indices.get(i); }
|
|
return indicesArray;
|
|
}
|
|
|
|
private static float convertDataToArrays(List<VertexNM> vertices, List<Vector2f> textures,
|
|
List<Vector3f> normals, float[] verticesArray, float[] texturesArray,
|
|
float[] normalsArray, float[] tangentsArray)
|
|
{
|
|
float furthestPoint = 0;
|
|
for (int i = 0; i < vertices.size(); i++)
|
|
{
|
|
VertexNM currentVertex = vertices.get(i);
|
|
if (currentVertex.getLength() > furthestPoint)
|
|
{ furthestPoint = currentVertex.getLength(); }
|
|
Vector3f position = currentVertex.getPosition();
|
|
Vector2f textureCoord = textures.get(currentVertex.getTextureIndex());
|
|
Vector3f normalVector = normals.get(currentVertex.getNormalIndex());
|
|
Vector3f tangent = currentVertex.getAverageTangent();
|
|
verticesArray[i * 3] = position.x;
|
|
verticesArray[i * 3 + 1] = position.y;
|
|
verticesArray[i * 3 + 2] = position.z;
|
|
texturesArray[i * 2] = textureCoord.x;
|
|
texturesArray[i * 2 + 1] = 1 - textureCoord.y;
|
|
normalsArray[i * 3] = normalVector.x;
|
|
normalsArray[i * 3 + 1] = normalVector.y;
|
|
normalsArray[i * 3 + 2] = normalVector.z;
|
|
tangentsArray[i * 3] = tangent.x;
|
|
tangentsArray[i * 3 + 1] = tangent.y;
|
|
tangentsArray[i * 3 + 2] = tangent.z;
|
|
}
|
|
return furthestPoint;
|
|
}
|
|
|
|
private static VertexNM dealWithAlreadyProcessedVertex(VertexNM previousVertex, int newTextureIndex,
|
|
int newNormalIndex, List<Integer> indices, List<VertexNM> vertices)
|
|
{
|
|
if (previousVertex.hasSameTextureAndNormal(newTextureIndex, newNormalIndex))
|
|
{
|
|
indices.add(previousVertex.getIndex());
|
|
return previousVertex;
|
|
}
|
|
else
|
|
{
|
|
VertexNM anotherVertex = previousVertex.getDuplicateVertex();
|
|
if (anotherVertex != null)
|
|
{
|
|
return dealWithAlreadyProcessedVertex(anotherVertex, newTextureIndex,
|
|
newNormalIndex, indices, vertices);
|
|
}
|
|
else
|
|
{
|
|
VertexNM duplicateVertex = previousVertex.duplicate(vertices.size());
|
|
duplicateVertex.setTextureIndex(newTextureIndex);
|
|
duplicateVertex.setNormalIndex(newNormalIndex);
|
|
previousVertex.setDuplicateVertex(duplicateVertex);
|
|
vertices.add(duplicateVertex);
|
|
indices.add(duplicateVertex.getIndex());
|
|
return duplicateVertex;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void removeUnusedVertices(List<VertexNM> vertices)
|
|
{
|
|
for (VertexNM vertex : vertices)
|
|
{
|
|
vertex.averageTangents();
|
|
if (!vertex.isSet())
|
|
{
|
|
vertex.setTextureIndex(0);
|
|
vertex.setNormalIndex(0);
|
|
}
|
|
}
|
|
}
|
|
} |