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An original thought
- Require embeddings to specify an origin coordinate on creation
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commit
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4 changed files with 34 additions and 9 deletions
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@ -5,6 +5,15 @@ import org.joml.Matrix4fc;
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import dev.engine_room.flywheel.api.backend.BackendImplemented;
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/**
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* A visualization context that can apply a transformation to instances created through its instancer provider.
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*
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* <p>This is intended to be used for large meta-visuals that may be composed of many block entities or entities.
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* Invoking a visualizer with a VisualEmbedding will create a "subvisual". The parent visual is responsible for managing
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* the lifecycle of subvisuals: deleting them, and optionally invoking their frame and tick plans. Subvisuals exist in
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* the real world from their perspective, and in general visuals should not care if they are within a VisualEmbedding.
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* However, if a visual wants to check it can use {@code instanceof VisualEmbedding} on its VisualizationContext.</p>
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*/
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@BackendImplemented
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public interface VisualEmbedding extends VisualizationContext {
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/**
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@ -17,9 +17,23 @@ public interface VisualizationContext {
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/**
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* All models render as if this position is (0, 0, 0).
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*
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* <p>For a Visual to appear in the correct position in the world,
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* it must render at its actual world position minus this renderOrigin.
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* <br>i.e. {@code be.getBlockPos() - visualizationContext.renderOrigin()}</p>
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*
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* <p>This exists to prevent floating point precision issues
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* when the camera is far away from the level's origin.</p>
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*
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* @return The origin of the renderer as a level position.
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*/
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Vec3i renderOrigin();
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VisualEmbedding createEmbedding();
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/**
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* Create a new embedding to compose visuals.
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*
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* @param renderOrigin The renderOrigin the embedding will appear to have.
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* @return The embedding.
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* @see VisualEmbedding
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*/
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VisualEmbedding createEmbedding(Vec3i renderOrigin);
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}
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@ -141,8 +141,8 @@ public class EngineImpl implements Engine {
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}
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@Override
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public VisualEmbedding createEmbedding() {
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var out = new EmbeddedEnvironment(EngineImpl.this, visualType);
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public VisualEmbedding createEmbedding(Vec3i renderOrigin) {
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var out = new EmbeddedEnvironment(EngineImpl.this, visualType, renderOrigin);
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environmentStorage.track(out);
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return out;
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}
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@ -21,6 +21,7 @@ import net.minecraft.core.Vec3i;
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public class EmbeddedEnvironment implements VisualEmbedding, Environment {
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private final EngineImpl engine;
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private final VisualType visualType;
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private final Vec3i renderOrigin;
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@Nullable
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private final EmbeddedEnvironment parent;
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private final InstancerProvider instancerProvider;
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@ -32,9 +33,10 @@ public class EmbeddedEnvironment implements VisualEmbedding, Environment {
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private boolean deleted = false;
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public EmbeddedEnvironment(EngineImpl engine, VisualType visualType, @Nullable EmbeddedEnvironment parent) {
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public EmbeddedEnvironment(EngineImpl engine, VisualType visualType, Vec3i renderOrigin, @Nullable EmbeddedEnvironment parent) {
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this.engine = engine;
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this.visualType = visualType;
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this.renderOrigin = renderOrigin;
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this.parent = parent;
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instancerProvider = new InstancerProvider() {
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@ -46,8 +48,8 @@ public class EmbeddedEnvironment implements VisualEmbedding, Environment {
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};
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}
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public EmbeddedEnvironment(EngineImpl engine, VisualType visualType) {
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this(engine, visualType, null);
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public EmbeddedEnvironment(EngineImpl engine, VisualType visualType, Vec3i renderOrigin) {
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this(engine, visualType, renderOrigin, null);
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}
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@Override
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@ -63,12 +65,12 @@ public class EmbeddedEnvironment implements VisualEmbedding, Environment {
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@Override
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public Vec3i renderOrigin() {
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return Vec3i.ZERO;
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return renderOrigin;
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}
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@Override
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public VisualEmbedding createEmbedding() {
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var out = new EmbeddedEnvironment(engine, visualType, this);
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public VisualEmbedding createEmbedding(Vec3i renderOrigin) {
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var out = new EmbeddedEnvironment(engine, visualType, renderOrigin, this);
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engine.environmentStorage()
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.track(out);
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return out;
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