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package makamys.neodymium.mixin;
import java.util.Collections;
import java.util.List;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Shadow;
import org.spongepowered.asm.mixin.Unique;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
import com.google.common.collect.Lists;
import makamys.neodymium.Neodymium;
import makamys.neodymium.ducks.IWorldRenderer;
import makamys.neodymium.renderer.ChunkMesh;
import makamys.neodymium.renderer.NeoRenderer;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.WorldRenderer;
import net.minecraft.entity.EntityLivingBase;
/** Inserts hooks in WorldRenderer to listen for changes, and to grab the tessellator data right before rendering. */
@Mixin(WorldRenderer.class)
abstract class MixinWorldRenderer implements IWorldRenderer {
@Shadow
private boolean isInFrustum;
@Shadow
public boolean[] skipRenderPass;
@Shadow
public boolean needsUpdate;
private boolean nd$savedDrawnStatus;
private List<ChunkMesh> nd$chunkMeshes;
@Inject(method = {"updateRenderer"}, at = @At(value = "HEAD"))
private void preUpdateRenderer(CallbackInfo ci) {
preUpdateRenderer(false);
}
@Inject(method = {"updateRendererSort"}, at = @At(value = "HEAD"))
private void preUpdateRendererSort(CallbackInfo ci) {
preUpdateRenderer(true);
}
@Unique
private void preUpdateRenderer(boolean sort) {
saveDrawnStatus();
if(Neodymium.isActive()) {
if(nd$chunkMeshes != null) {
Collections.fill(nd$chunkMeshes, null);
} else {
nd$chunkMeshes = Lists.newArrayList(null, null);
}
}
}
@Inject(method = {"updateRenderer"}, at = @At(value = "RETURN"))
private void postUpdateRenderer(CallbackInfo ci) {
postUpdateRenderer(false);
}
@Inject(method = {"updateRendererSort"}, at = @At(value = "RETURN"))
private void postUpdateRendererSort(CallbackInfo ci) {
postUpdateRenderer(true);
}
@Unique
private void postUpdateRenderer(boolean sort) {
notifyIfDrawnStatusChanged();
if(Neodymium.isActive()) {
if(nd$chunkMeshes != null) {
Neodymium.renderer.onWorldRendererPost(WorldRenderer.class.cast(this), sort);
Collections.fill(nd$chunkMeshes, null);
}
}
}
@Inject(method = "postRenderBlocks", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/renderer/Tessellator;draw()I"))
private void prePostRenderBlocks(int pass, EntityLivingBase entity, CallbackInfo ci) {
if(Neodymium.isActive()) {
if(nd$chunkMeshes != null) {
nd$chunkMeshes.set(pass, ChunkMesh.fromTessellator(pass, WorldRenderer.class.cast(this), Tessellator.instance));
}
}
}
@Inject(method = "setDontDraw", at = @At(value = "HEAD"))
private void preSetDontDraw(CallbackInfo ci) {
if(Neodymium.isActive()) {
Neodymium.renderer.onWorldRendererChanged(WorldRenderer.class.cast(this), NeoRenderer.WorldRendererChange.DELETED);
}
}
@Override
public List<ChunkMesh> getChunkMeshes() {
return nd$chunkMeshes;
}
@Inject(method = "updateInFrustum", at = @At(value = "HEAD"))
private void preUpdateInFrustum(CallbackInfo ci) {
saveDrawnStatus();
}
@Inject(method = "updateInFrustum", at = @At(value = "RETURN"))
private void postUpdateInFrustum(CallbackInfo ci) {
notifyIfDrawnStatusChanged();
}
@Unique
private void saveDrawnStatus() {
nd$savedDrawnStatus = isDrawn();
}
@Unique
private void notifyIfDrawnStatusChanged() {
boolean drawn = isDrawn();
if(Neodymium.isActive() && drawn != nd$savedDrawnStatus) {
Neodymium.renderer.onWorldRendererChanged(WorldRenderer.class.cast(this), drawn ? NeoRenderer.WorldRendererChange.VISIBLE : NeoRenderer.WorldRendererChange.INVISIBLE);
}
}
@Override
public boolean isDrawn() {
return isInFrustum && (!skipRenderPass[0] || !skipRenderPass[1]);
}
}
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