mirror of
https://github.com/lax1dude/eagler-binary-tools.git
synced 2024-12-21 23:04:17 -08:00
Implement light mesh generator
This commit is contained in:
lax1dude
parent
c1f5a2e761
commit
c778b14e4e
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@ -65,6 +65,7 @@ public class EaglerBinaryTools {
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return;
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case "light-mesh-gen":
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case "lightmeshgen":
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LightMeshGen._main(argz);
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return;
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case "eagler-moon-gen":
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case "eaglermoongen":
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@ -79,7 +80,7 @@ public class EaglerBinaryTools {
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}
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private static void usage() {
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System.out.println("Usage: java -jar EaglerBinaryTools.jar <epkcompiler|legacy-epkcompiler|epkdecompiler|obj2mdl-1.5|obj2mdl-1.8|ebp-encode|ebp-decode|skybox-gen|light-mesh-gen|eagler-moon-gen|lens-flare-gen> [args...]");
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System.out.println("Usage: java -jar EaglerBinaryTools.jar <epkcompiler|legacy-epkcompiler|epkdecompiler|obj2mdl-1.5|obj2mdl-1.8|ebp-encode|ebp-decode|skybox-gen|light-mesh-gen|eagler-bmp-gen> [args...]");
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System.out.println(" - 'epkcompiler': Compile an EPK file from a folder");
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System.out.println(" - 'legacy-epkcompiler': Compile an EPK file in legacy format");
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System.out.println(" - 'epkdecompiler': Decompile an EPK file into a folder");
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@ -0,0 +1,158 @@
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package net.lax1dude.eaglercraft.bintools;
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import java.io.BufferedReader;
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import java.io.DataOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.List;
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import net.lax1dude.eaglercraft.bintools.utils.IEEE754;
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/**
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* Copyright (c) 2023-2024 lax1dude. All Rights Reserved.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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public class LightMeshGen {
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public static void _main(String[] args) throws IOException {
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if(args.length != 2 && args.length != 3) {
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System.out.println("Usage: light-mesh-gen <obj file> <output file> [mesh name]");
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System.out.println("Input file format is Wavefront OBJ file exported from your 3D modeling program");
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System.out.println("The only mesh name currently used by eagler is \"light_point_mesh\"");
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return;
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}
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System.out.println("Reading input file...");
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List<String> lns = new ArrayList();
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try(BufferedReader bu = new BufferedReader(new FileReader(new File(args[0])))) {
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String s;
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while((s = bu.readLine()) != null) {
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lns.add(s);
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}
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}
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File output = new File(args[1]);
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System.out.println("Exporting light mesh: " + output.getAbsolutePath());
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try(FileOutputStream fs = new FileOutputStream(output)) {
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convertModel(lns, args.length == 3 ? args[2] : "light_point_mesh", fs);
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}
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System.out.println("Light mesh export complete!");
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}
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public static void convertModel(Collection<String> lines, String name, OutputStream out) throws IOException {
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List<float[]> vertexes = new ArrayList<float[]>();
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List<int[][]> faces = new ArrayList<int[][]>();
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List<byte[]> vboentries = new ArrayList<byte[]>();
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List<float[]> vboentriesF = new ArrayList<float[]>();
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List<byte[]> indexablevboentries = new ArrayList<byte[]>();
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List<Integer> indexbuffer = new ArrayList<Integer>();
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for(String ul : lines) {
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String[] l = ul.split(" ");
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if(l[0].equals("v")) {
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vertexes.add(new float[] {Float.parseFloat(l[1]), Float.parseFloat(l[2]), Float.parseFloat(l[3])});
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}
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if(l[0].equals("f")) {
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if(l.length != 4) {
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OBJConverter.printTriangulationMessage();
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throw new IOException("Incompatible model! (This can be fixed)");
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}
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String[] v1 = l[1].split("/");
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String[] v2 = l[2].split("/");
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String[] v3 = l[3].split("/");
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faces.add(new int[][] {
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{Integer.parseInt(v1[0]), Integer.parseInt(v1[1]), Integer.parseInt(v1[2])},
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{Integer.parseInt(v2[0]), Integer.parseInt(v2[1]), Integer.parseInt(v2[2])},
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{Integer.parseInt(v3[0]), Integer.parseInt(v3[1]), Integer.parseInt(v3[2])}
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});
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}
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}
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int w = 32;
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int h = 16;
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int[] normalsLookupTexture = new int[w * h];
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int normalsId = 0;
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for(int[][] f : faces) {
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for(int i = 0; i < 3; i++) {
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byte[] b = new byte[6];
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float[] v = vertexes.get(f[i][0]-1);
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int ix = IEEE754.encodeHalfFloat(v[0]);
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int iy = IEEE754.encodeHalfFloat(v[1]);
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int iz = IEEE754.encodeHalfFloat(v[2]);
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int idx = 0;
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b[idx++] = (byte)(ix); b[idx++] = (byte)(ix >> 8);
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b[idx++] = (byte)(iy); b[idx++] = (byte)(iy >> 8);
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b[idx++] = (byte)(iz); b[idx++] = (byte)(iz >> 8);
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vboentries.add(b);
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vboentriesF.add(v);
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}
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}
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for(int j = 0; j < vboentries.size(); ++j) {
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byte v[] = vboentries.get(j);
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int l = indexablevboentries.size();
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boolean flag = true;
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for(int i = 0; i < l; i++) {
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if(Arrays.equals(v, indexablevboentries.get(i))) {
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indexbuffer.add(i);
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flag = false;
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break;
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}
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}
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if(flag) {
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if(l > 255) {
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throw new UnsupportedOperationException("Too many vertices!");
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}
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indexbuffer.add(l);
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indexablevboentries.add(v);
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}
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}
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DataOutputStream o = new DataOutputStream(out);
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o.write(0xEE);
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o.write(0xAA);
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o.write(0x66);
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o.write('%');
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o.write(name.length());
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o.write(name.getBytes(StandardCharsets.US_ASCII));
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o.writeInt(indexablevboentries.size());
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for(int i = 0; i < indexablevboentries.size(); ++i) {
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byte[] b = indexablevboentries.get(i);
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o.write(b, 0, b.length);
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}
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o.writeInt(indexbuffer.size());
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o.write(1); // 1 = byte, 2 = short, 4 = int
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for(int i : indexbuffer) {
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o.write(i & 0xFF);
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}
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o.close();
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}
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}
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@ -12,6 +12,8 @@ import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import net.lax1dude.eaglercraft.bintools.utils.IEEE754;
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/**
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* Copyright (c) 2023-2024 lax1dude. All Rights Reserved.
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*
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@ -98,9 +100,9 @@ public class SkyboxGen {
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float[] v = vertexes.get(f[i][0]-1);
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int ix = encodeHalfFloat(v[0]);
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int iy = encodeHalfFloat(v[1]);
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int iz = encodeHalfFloat(v[2]);
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int ix = IEEE754.encodeHalfFloat(v[0]);
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int iy = IEEE754.encodeHalfFloat(v[1]);
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int iz = IEEE754.encodeHalfFloat(v[2]);
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int idx = 0;
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@ -147,9 +149,9 @@ public class SkyboxGen {
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float[] v = vertexes.get(f[i][0]-1);
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int ix = encodeHalfFloat(v[0]);
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int iy = encodeHalfFloat(v[1]);
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int iz = encodeHalfFloat(v[2]);
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int ix = IEEE754.encodeHalfFloat(v[0]);
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int iy = IEEE754.encodeHalfFloat(v[1]);
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int iz = IEEE754.encodeHalfFloat(v[2]);
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int idx = 0;
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@ -289,31 +291,4 @@ public class SkyboxGen {
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o.close();
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}
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//source: https://stackoverflow.com/questions/6162651/half-precision-floating-point-in-java
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public static int encodeHalfFloat(float fval) {
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int fbits = Float.floatToIntBits(fval);
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int sign = fbits >>> 16 & 0x8000; // sign only
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int val = (fbits & 0x7fffffff) + 0x1000; // rounded value
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if (val >= 0x47800000) // might be or become NaN/Inf
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{ // avoid Inf due to rounding
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if ((fbits & 0x7fffffff) >= 0x47800000) { // is or must become NaN/Inf
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if (val < 0x7f800000) // was value but too large
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return sign | 0x7c00; // make it +/-Inf
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return sign | 0x7c00 | // remains +/-Inf or NaN
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(fbits & 0x007fffff) >>> 13; // keep NaN (and Inf) bits
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}
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return sign | 0x7bff; // unrounded not quite Inf
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}
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if (val >= 0x38800000) // remains normalized value
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return sign | val - 0x38000000 >>> 13; // exp - 127 + 15
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if (val < 0x33000000) // too small for subnormal
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return sign; // becomes +/-0
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val = (fbits & 0x7fffffff) >>> 23; // tmp exp for subnormal calc
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return sign | ((fbits & 0x7fffff | 0x800000) // add subnormal bit
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+ (0x800000 >>> val - 102) // round depending on cut off
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>>> 126 - val); // div by 2^(1-(exp-127+15)) and >> 13 | exp=0
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}
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}
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@ -0,0 +1,32 @@
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package net.lax1dude.eaglercraft.bintools.utils;
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public class IEEE754 {
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// source: https://stackoverflow.com/questions/6162651/half-precision-floating-point-in-java
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public static int encodeHalfFloat(float fval) {
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int fbits = Float.floatToIntBits(fval);
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int sign = fbits >>> 16 & 0x8000; // sign only
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int val = (fbits & 0x7fffffff) + 0x1000; // rounded value
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if (val >= 0x47800000) // might be or become NaN/Inf
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{ // avoid Inf due to rounding
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if ((fbits & 0x7fffffff) >= 0x47800000) { // is or must become NaN/Inf
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if (val < 0x7f800000) // was value but too large
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return sign | 0x7c00; // make it +/-Inf
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return sign | 0x7c00 | // remains +/-Inf or NaN
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(fbits & 0x007fffff) >>> 13; // keep NaN (and Inf) bits
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}
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return sign | 0x7bff; // unrounded not quite Inf
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}
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if (val >= 0x38800000) // remains normalized value
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return sign | val - 0x38000000 >>> 13; // exp - 127 + 15
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if (val < 0x33000000) // too small for subnormal
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return sign; // becomes +/-0
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val = (fbits & 0x7fffffff) >>> 23; // tmp exp for subnormal calc
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return sign | ((fbits & 0x7fffff | 0x800000) // add subnormal bit
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+ (0x800000 >>> val - 102) // round depending on cut off
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>>> 126 - val); // div by 2^(1-(exp-127+15)) and >> 13 | exp=0
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}
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}
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