Add .blend export
This commit is contained in:
Jonas Herzig
215
src/main/java/com/replaymod/render/blend/BlendMeshBuilder.java
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215
src/main/java/com/replaymod/render/blend/BlendMeshBuilder.java
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package com.replaymod.render.blend;
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import com.replaymod.render.blend.data.DMaterial;
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import com.replaymod.render.blend.data.DMesh;
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import net.minecraft.client.renderer.Tessellator;
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import net.minecraft.client.renderer.WorldRenderer;
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import net.minecraft.client.renderer.vertex.VertexFormat;
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import net.minecraft.client.renderer.vertex.VertexFormatElement;
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import org.lwjgl.opengl.GL11;
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import org.lwjgl.util.vector.Vector2f;
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import org.lwjgl.util.vector.Vector3f;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.IntBuffer;
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import java.util.ArrayList;
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import java.util.List;
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public class BlendMeshBuilder extends WorldRenderer {
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private final DMesh mesh;
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private final List<DMesh.Vertex> vertices = new ArrayList<>();
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private final List<Vector2f> uvs = new ArrayList<>();
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private final List<Integer> colors = new ArrayList<>();
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private Vector3f offset = new Vector3f(0, 0, 0);
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private boolean isDrawing;
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private boolean wellBehaved;
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private int mode;
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private float u, v;
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private int color = 0xffffffff; // Default not in parent class but probably set implicitly somewhere due to re-use
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public BlendMeshBuilder(DMesh mesh) {
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super(0);
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this.mesh = mesh;
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}
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public void setWellBehaved(boolean wellBehaved) {
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this.wellBehaved = wellBehaved;
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}
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public void setOffset(Vector3f offset) {
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this.offset = offset;
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}
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@Override
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public void startDrawing(int mode) {
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if (isDrawing) {
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if (!wellBehaved) {
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// Someone probably finished drawing with the global instance instead of this one,
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// let's just assume that what's happened and finish our last draw by ourselves
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// (might miss correct texture though)
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doFinish();
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} else {
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throw new IllegalStateException("Already drawing!");
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}
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}
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this.isDrawing = true;
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this.mode = mode;
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if (!wellBehaved) {
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// In case the calling code finishes with Tessellator.getInstance().draw()
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Tessellator.getInstance().getWorldRenderer().startDrawingQuads();
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}
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}
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public void maybeFinishDrawing() {
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if (isDrawing) {
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doFinish();
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}
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}
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@Override
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public int finishDrawing() {
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if (!isDrawing) {
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throw new IllegalStateException("Not building!");
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} else {
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if (!wellBehaved) {
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Tessellator.getInstance().getWorldRenderer().finishDrawing();
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}
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doFinish();
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return -1;
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}
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}
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private void doFinish() {
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this.isDrawing = false;
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DMaterial activeMaterial = BlendState.getState().getMaterials().getActiveMaterial();
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int materialSlot = mesh.materials.indexOf(activeMaterial);
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if (materialSlot < 0) {
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materialSlot = mesh.materials.size();
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mesh.materials.add(activeMaterial);
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}
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switch (mode) {
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case GL11.GL_TRIANGLES:
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for (int i = 0; i < vertices.size(); i+=3) {
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mesh.addTriangle(
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vertices.get(i ),
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vertices.get(i + 1),
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vertices.get(i + 2),
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uvs.get(i ),
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uvs.get(i + 1),
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uvs.get(i + 2),
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colors.get(i ),
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colors.get(i + 1),
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colors.get(i + 2),
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materialSlot
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);
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}
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break;
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case GL11.GL_QUADS:
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for (int i = 0; i < vertices.size(); i+=4) {
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mesh.addQuad(
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vertices.get(i ),
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vertices.get(i + 1),
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vertices.get(i + 2),
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vertices.get(i + 3),
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uvs.get(i ),
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uvs.get(i + 1),
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uvs.get(i + 2),
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uvs.get(i + 3),
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colors.get(i ),
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colors.get(i + 1),
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colors.get(i + 2),
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colors.get(i + 3),
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materialSlot
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);
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}
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break;
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default:
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throw new UnsupportedOperationException("Unsupported mode: " + mode);
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}
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}
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@Override
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public void setTextureUV(double u, double v) {
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this.u = (float) u;
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this.v = (float) (1 - v);
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}
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@Override
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public void setColorRGBA(int r, int g, int b, int a) {
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this.color = r | (g << 8) | (b << 16) | (a << 24);
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}
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@Override
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public void addVertex(double x, double y, double z) {
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x -= offset.x;
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y -= offset.y;
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z -= offset.z;
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vertices.add(new DMesh.Vertex((float) x, (float) -z, (float) y));
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uvs.add(new Vector2f(u, v));
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colors.add(color);
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}
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@Override
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@SuppressWarnings("unchecked")
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public void addVertexData(int[] ints) {
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ByteBuffer buffer = ByteBuffer.allocate(ints.length * 4).order(ByteOrder.nativeOrder());
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IntBuffer intBuffer = buffer.asIntBuffer();
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intBuffer.put(ints);
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VertexFormat vertexFormat = getVertexFormat();
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int posOffset = -1, colorOffset = -1, uvOffset = -1;
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List<VertexFormatElement> elements = vertexFormat.getElements();
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for (VertexFormatElement element : elements) {
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switch (element.getUsage()) {
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case POSITION: posOffset = element.getOffset(); break;
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case COLOR: colorOffset = element.getOffset(); break;
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case UV: if (element.getIndex() == 0) uvOffset = element.getOffset(); break;
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}
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}
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if (posOffset == -1) throw new IllegalStateException("No position element in " + vertexFormat);
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if (uvOffset == -1) throw new IllegalStateException("No uv element in " + vertexFormat);
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for (int offset = 0; offset < buffer.remaining(); offset += vertexFormat.getNextOffset()) {
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// TODO doesn't check buffer element types (works for vanilla because they're always the same)
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if (colorOffset != -1) {
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color = buffer.getInt(offset + colorOffset);
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}
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setTextureUV(
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buffer.getFloat(offset + uvOffset),
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buffer.getFloat(offset + uvOffset + 4)
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);
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addVertex(
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buffer.getFloat(offset + posOffset ),
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buffer.getFloat(offset + posOffset + 4),
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buffer.getFloat(offset + posOffset + 8)
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);
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}
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}
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@Override
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public int getVertexCount() {
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return vertices.size();
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}
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public void putColorRGBA(int byteIndex, int r, int g, int b, int a) {
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int color = r | (g << 8) | (b << 16) | (a << 24);
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putColor(color, -1); // FIXME: reverse index calculation
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}
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private void putColor(int color, int reverseIndex) {
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colors.set(colors.size() - reverseIndex, color);
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}
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public void putColor4(int color) {
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for (int i = 0; i < 4; i++) {
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putColor(color, i + 1);
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}
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}
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// FIXME overwrite putX and more
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}
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