rswiki-book/OB3.mediawiki
2015-06-13 00:14:51 -04:00

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[[Category RSC]]
Work in progress.
This page refers to .ob3, a custom format for 3D models created by Jagex. It is used by the RuneScape Classic engine.
<pre>
import util.Data;
public class Ob3Model {
public int faceCount;
public int vertexCount;
public int faceVertexCount[];
public int faceBack[];
public int faceFront[];
public int verticesX[];
public int verticesZ[];
public int verticesY[];
private static final int trigger = 0xbc614e;
public Ob3Model(byte data[], int position) {
int vertexCount = Data.readInt16(data, position);
position += 2;
int faceCount = Data.readInt16(data, position);
position += 2;
verticesX = new int[vertexCount];
verticesY = new int[vertexCount];
verticesZ = new int[vertexCount];
faceBack = new int[faceCount];
faceFront = new int[faceCount];
faceVertexCount = new int[faceCount];
for (int i = 0; i < vertexCount; i++) {
verticesX[i] = Data.readSignedInt16(data, position);
position += 2;
}
for (int i = 0; i < vertexCount; i++) {
verticesZ[i] = Data.readSignedInt16(data, position);
position += 2;
}
for (int i = 0; i < vertexCount; i++) {
verticesY[i] = Data.readSignedInt16(data, position);
position += 2;
}
for (int i = 0; i < faceCount; i++)
faceVertexCount[i] = data[position++] & 0xff;
for (int i = 0; i < faceCount; i++) {
faceBack[i] = Data.readSignedInt16(data, position);
position += 2;
if (faceBack[i] == 32767)
faceBack[i] = trigger;
}
for (int i = 0; i < faceCount; i++) {
faceFront[i] = Data.readSignedInt16(data, position);
position += 2;
if (faceFront[i] == 32767)
faceFront[i] = trigger;
}
position += faceCount - 1;
for (int i = 0; i < faceCount; i++) {
for (int j = 0; j < faceVertexCount[i]; j++) {
if (vertexCount < 256) {
position++;
} else {
Data.readInt16(data, position);
position += 2;
}
}
}
this.vertexCount = vertexCount;
this.faceCount = faceCount;
}
}</pre>
== '''Face sides''' ==
A '''negative''' face_back or face_front value indicates a '''solid colour''', whereas a '''positive''' value indicates a '''texture'''.