KSP-Conformal-Decals/Source/ConformalDecals/ModuleConformalDecal.cs
drewcassidy e504936896 Add projection and loading functionality
ModuleConformalDecal is now, theoretically, sorta working
2020-05-30 13:36:10 -07:00

163 lines
6.3 KiB
C#

using System;
using System.Collections.Generic;
using ConformalDecals.MaterialModifiers;
using UniLinq;
using UnityEngine;
namespace ConformalDecals {
public class ModuleConformalDecal : PartModule {
[KSPField] public string decalPreviewTransform = "";
[KSPField] public string decalModelTransform = "";
[KSPField(guiName = "Scale", guiActive = false, guiActiveEditor = true, isPersistant = true, guiFormat = "F2", guiUnits = "m"),
UI_FloatRange(minValue = 0.05f, maxValue = 4f, stepIncrement = 0.05f)]
public float scale = 1.0f;
[KSPField(guiName = "Depth", guiActive = false, guiActiveEditor = true, isPersistant = true, guiFormat = "F2", guiUnits = "m"),
UI_FloatRange(minValue = 0.05f, maxValue = 4f, stepIncrement = 0.05f)]
public float depth = 1.0f;
[KSPField(guiActive = true, guiFormat = "F2", guiName = "Aspect Ratio")]
public float aspectRatio = 1.0f;
private List<ProjectionTarget> _targets;
private MaterialPropertyCollection _materialProperties;
private Material _material;
private Matrix4x4 _orthoMatrix;
private Bounds _decalBounds;
private Transform _decalPreviewTransform;
private Transform _decalModelTransform;
private bool IsAttached => part.parent != null;
public override void OnLoad(ConfigNode node) {
if (HighLogic.LoadedSceneIsGame) {
try {
var materialNode = node.GetNode("MATERIAL") ?? throw new FormatException("Missing MATERIAL node in module");
_materialProperties = new MaterialPropertyCollection(materialNode, this);
_material = _materialProperties.ParsedMaterial;
var mainTexture = _materialProperties.MainTextureProperty;
if (mainTexture != null) {
aspectRatio = mainTexture.AspectRatio;
}
else {
aspectRatio = 1;
}
_decalPreviewTransform = part.FindModelTransform(decalPreviewTransform);
if (_decalPreviewTransform == null) throw new FormatException("Missing decal preview reference");
_decalModelTransform = part.FindModelTransform(decalModelTransform);
if (_decalModelTransform == null) throw new FormatException("Missing decal mesh reference");
}
catch (Exception e) {
this.LogException("Exception parsing partmodule", e);
}
}
}
public override void OnStart(StartState state) {
_orthoMatrix = Matrix4x4.identity;
_orthoMatrix[0, 3] = 0.5f;
_orthoMatrix[1, 3] = 0.5f;
if ((state & StartState.Editor) != 0) {
GameEvents.onEditorPartEvent.Add(OnEditorEvent);
Fields[nameof(scale)].uiControlEditor.onFieldChanged = OnTweakEvent;
Fields[nameof(depth)].uiControlEditor.onFieldChanged = OnTweakEvent;
}
else {
if (IsAttached) Attach();
}
}
public void OnDisable() {
// remove from preCull delegate
Camera.onPreCull -= Render;
}
public void OnTweakEvent(BaseField field, object obj) {
// scale or depth values have been changed, so update the projection matrix for each target
Project();
}
public void OnEditorEvent(ConstructionEventType eventType, Part eventPart) {
if (eventPart != this.part) return;
switch (eventType) {
case ConstructionEventType.PartAttached:
Attach();
break;
case ConstructionEventType.PartDetached:
Detach();
break;
case ConstructionEventType.PartOffsetting:
case ConstructionEventType.PartRotated:
case ConstructionEventType.PartDragging:
Project();
break;
}
}
public void Attach() {
if (!IsAttached) {
this.LogError("Attach function called but part has no parent!");
return;
}
// find all valid renderers
var renderers = part.parent.transform.GetComponentsInChildren<MeshRenderer>(false).Where(o => o.GetComponent<MeshFilter>() != null);
// generate ProjectionTarget objects for each valid meshrenderer
_targets = renderers.Select(o => new ProjectionTarget(o, o.GetComponent<MeshFilter>().mesh, _materialProperties)).ToList();
// hide preview model
_decalModelTransform.gameObject.SetActive(false);
// add to preCull delegate
Camera.onPreCull += Render;
}
public void Detach() {
if (IsAttached) {
this.LogError("Detach function called but part still has parent!");
return;
}
// unhide preview model
_decalModelTransform.gameObject.SetActive(true);
// remove from preCull delegate
Camera.onPreCull -= Render;
}
[KSPEvent(guiActive = false, guiName = "Project", guiActiveEditor =true, active = true)]
public void Project() {
if (!IsAttached) return;
// generate orthogonal matrix scale values
_orthoMatrix[0, 0] = 1 / scale;
_orthoMatrix[1, 1] = 1 / (aspectRatio * scale);
_orthoMatrix[2, 2] = 1 / depth;
// generate bounding box for decal for culling purposes
_decalBounds.center = Vector3.forward * (depth / 2);
_decalBounds.extents = new Vector3(scale / 2, aspectRatio * scale / 2, depth / 2);
// project to each target object
foreach (var target in _targets) {
target.Project(_orthoMatrix, _decalBounds);
}
}
public void Render(Camera camera) {
if (!IsAttached) return;
// render on each target object
foreach (var target in _targets) {
target.Render(_material, part.mpb, camera);
}
}
}
}