382 lines
16 KiB
C++
382 lines
16 KiB
C++
#include "MetaCoreRender/MetaCoreSceneRenderSync.h"
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#include "MetaCoreRender/MetaCoreRenderTypes.h"
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#include "MetaCoreScene/MetaCoreScene.h"
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#include "MetaCoreScene/MetaCoreTransformUtils.h"
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#include <glm/ext/matrix_clip_space.hpp>
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#include <glm/ext/matrix_transform.hpp>
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#include <glm/geometric.hpp>
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#include <glm/vec4.hpp>
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#include <algorithm>
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#include <cmath>
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namespace MetaCore {
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namespace {
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[[nodiscard]] bool MetaCoreIsUsableDirection(const glm::vec3& value) {
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return std::isfinite(value.x) &&
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std::isfinite(value.y) &&
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std::isfinite(value.z) &&
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glm::length(value) > 0.0001F;
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}
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[[nodiscard]] glm::vec3 MetaCoreExtractTranslation(const glm::mat4& matrix) {
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return glm::vec3(matrix[3]);
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}
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[[nodiscard]] std::string MetaCoreNormalizeSyncPath(std::string path) {
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std::replace(path.begin(), path.end(), '\\', '/');
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return path;
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}
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[[nodiscard]] float MetaCoreSafeAspectRatio(float width, float height) {
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return height > 0.0001F ? std::max(0.0001F, width / height) : 1.0F;
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}
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[[nodiscard]] glm::mat4 MetaCoreBuildProjectionMatrix(
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const MetaCoreSceneView& sceneView,
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float aspectRatio
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) {
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const float nearClip = std::max(0.0001F, sceneView.NearClip);
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const float farClip = std::max(nearClip + 0.0001F, sceneView.FarClip);
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if (sceneView.ProjectionMode == MetaCoreCameraProjectionMode::Orthographic) {
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const float halfHeight = std::max(0.0001F, sceneView.OrthographicSize);
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const float halfWidth = halfHeight * aspectRatio;
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return glm::ortho(-halfWidth, halfWidth, -halfHeight, halfHeight, nearClip, farClip);
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}
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const float fovDegrees = std::clamp(sceneView.VerticalFieldOfViewDegrees, 1.0F, 179.0F);
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return glm::perspective(glm::radians(fovDegrees), aspectRatio, nearClip, farClip);
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}
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[[nodiscard]] glm::vec3 MetaCoreSafeForward(const MetaCoreSceneView& sceneView) {
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glm::vec3 forward = sceneView.CameraTarget - sceneView.CameraPosition;
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if (!MetaCoreIsUsableDirection(forward)) {
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forward = glm::vec3(0.0F, 0.0F, -1.0F);
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}
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return glm::normalize(forward);
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}
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[[nodiscard]] glm::vec3 MetaCoreSafeUp(const MetaCoreSceneView& sceneView, const glm::vec3& forward) {
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glm::vec3 up = sceneView.CameraUp;
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if (!MetaCoreIsUsableDirection(up) || glm::length(glm::cross(forward, up)) <= 0.0001F) {
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up = glm::vec3(0.0F, 1.0F, 0.0F);
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}
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if (glm::length(glm::cross(forward, up)) <= 0.0001F) {
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up = glm::vec3(0.0F, 0.0F, 1.0F);
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}
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return glm::normalize(up);
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}
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} // namespace
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MetaCoreSceneRenderSyncSnapshot MetaCoreSceneRenderSync::BuildSnapshot(const MetaCoreScene& scene) const {
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MetaCoreSceneRenderSyncSnapshot snapshot;
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snapshot.FrameId = ++FrameId_;
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snapshot.SceneRevision = scene.GetRevision();
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snapshot.Environment = scene.GetEnvironmentSettings();
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// 预处理：构建子树模型网格节点计数表，支撑在没有 Tag 时的 Fallback 回溯
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std::unordered_map<MetaCoreId, std::unordered_map<std::string, int>> subtreeModelCounts;
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for (MetaCoreId objectId : scene.BuildHierarchyPreorder()) {
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const MetaCoreGameObject gameObject = scene.FindGameObject(objectId);
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if (gameObject && gameObject.HasComponent<MetaCoreMeshRendererComponent>()) {
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const auto& mesh = gameObject.GetComponent<MetaCoreMeshRendererComponent>();
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if (mesh.ModelNodeIndex >= 0 && !mesh.SourceModelPath.empty()) {
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std::string normPath = MetaCoreNormalizeSyncPath(mesh.SourceModelPath);
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MetaCoreId currentId = objectId;
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while (currentId != 0) {
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auto currentObj = scene.FindGameObject(currentId);
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if (!currentObj) break;
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subtreeModelCounts[currentId][normPath]++;
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currentId = currentObj.GetParentId();
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}
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}
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}
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}
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for (MetaCoreId objectId : scene.BuildHierarchyPreorder()) {
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const MetaCoreGameObject gameObject = scene.FindGameObject(objectId);
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if (!gameObject) {
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continue;
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}
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glm::mat4 localMatrix{1.0F};
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if (gameObject.HasComponent<MetaCoreTransformComponent>()) {
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localMatrix = MetaCoreBuildTransformMatrix(gameObject.GetComponent<MetaCoreTransformComponent>());
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}
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glm::mat4 worldMatrix = localMatrix;
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const MetaCoreId parentId = gameObject.GetParentId();
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if (parentId != 0) {
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const auto parentWorldIt = snapshot.WorldMatrices.find(parentId);
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if (parentWorldIt != snapshot.WorldMatrices.end()) {
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worldMatrix = parentWorldIt->second * localMatrix;
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}
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}
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snapshot.WorldMatrices[objectId] = worldMatrix;
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snapshot.LocalMatrices[objectId] = localMatrix;
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if (gameObject.HasComponent<MetaCoreMeshRendererComponent>()) {
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const auto& meshRenderer = gameObject.GetComponent<MetaCoreMeshRendererComponent>();
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// 黄金算法：溯源确定唯一的模型根加载主体
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MetaCoreGameObject hostRoot = gameObject;
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if (meshRenderer.ModelNodeIndex >= 0) {
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const std::string& currentModelPath = meshRenderer.SourceModelPath;
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std::string normCurrentPath = MetaCoreNormalizeSyncPath(currentModelPath);
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MetaCoreGameObject current = gameObject;
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MetaCoreGameObject foundRoot = {};
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// 1. 优先通过运行时 MetaCoreModelRootTag 快速寻找顶级根
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while (current) {
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if (current.HasComponent<MetaCoreModelRootTag>()) {
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auto& tag = current.GetComponent<MetaCoreModelRootTag>();
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if (MetaCoreNormalizeSyncPath(tag.SourceModelPath) == normCurrentPath) {
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foundRoot = current;
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break;
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}
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}
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if (current.GetParentId() == 0) break;
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current = scene.FindGameObject(current.GetParentId());
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}
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if (foundRoot) {
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hostRoot = foundRoot;
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} else {
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// 2. Fallback：若无明确 Tag，使用转折点判定算法
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current = gameObject;
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MetaCoreGameObject bestCandidate = gameObject;
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int maxCount = subtreeModelCounts[gameObject.GetId()][normCurrentPath];
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while (current) {
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int count = subtreeModelCounts[current.GetId()][normCurrentPath];
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if (count > maxCount) {
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maxCount = count;
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bestCandidate = current;
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}
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if (current.GetParentId() == 0) break;
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current = scene.FindGameObject(current.GetParentId());
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}
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hostRoot = bestCandidate;
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}
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}
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snapshot.Renderables.push_back(MetaCoreRenderSyncRenderable{
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objectId,
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parentId,
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gameObject.GetName(),
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localMatrix,
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worldMatrix,
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meshRenderer.Visible,
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meshRenderer.MeshSource,
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meshRenderer.BuiltinMesh,
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meshRenderer.MeshAssetGuid,
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meshRenderer.SourceModelAssetGuid,
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meshRenderer.SourceModelPath,
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meshRenderer.ModelNodeIndex,
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hostRoot.GetId(),
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hostRoot.GetName(),
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hostRoot.HasComponent<MetaCoreModelRootTag>(),
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meshRenderer.MaterialAssetGuids,
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meshRenderer.BaseColor,
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meshRenderer.Metallic,
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meshRenderer.Roughness,
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meshRenderer.EmissiveColor,
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meshRenderer.AlphaMode,
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meshRenderer.AlphaCutoff,
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meshRenderer.DoubleSided,
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meshRenderer.BaseColorTexturePath,
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meshRenderer.MetallicRoughnessTexturePath,
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meshRenderer.NormalTexturePath,
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meshRenderer.EmissiveTexturePath,
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meshRenderer.AoTexturePath
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});
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}
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if (gameObject.HasComponent<MetaCoreCameraComponent>()) {
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const auto& camera = gameObject.GetComponent<MetaCoreCameraComponent>();
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MetaCoreRenderSyncCamera syncCamera;
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syncCamera.ObjectId = objectId;
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syncCamera.IsPrimary = camera.IsPrimary;
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syncCamera.FieldOfViewDegrees = camera.FieldOfViewDegrees;
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syncCamera.NearClip = camera.NearClip;
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syncCamera.FarClip = camera.FarClip;
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syncCamera.WorldMatrix = worldMatrix;
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syncCamera.Enabled = camera.Enabled;
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syncCamera.ProjectionMode = camera.ProjectionMode;
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syncCamera.OrthographicSize = camera.OrthographicSize;
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syncCamera.Depth = camera.Depth;
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syncCamera.CullingMask = camera.CullingMask;
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syncCamera.ClearFlags = camera.ClearFlags;
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syncCamera.BackgroundColor = camera.BackgroundColor;
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syncCamera.BackgroundAlpha = camera.BackgroundAlpha;
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snapshot.Cameras.push_back(syncCamera);
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if (syncCamera.IsPrimary && syncCamera.Enabled && !snapshot.PrimaryCamera.has_value()) {
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snapshot.PrimaryCamera = syncCamera;
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}
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}
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if (gameObject.HasComponent<MetaCoreLightComponent>()) {
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const auto& light = gameObject.GetComponent<MetaCoreLightComponent>();
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snapshot.Lights.push_back(MetaCoreRenderSyncLight{
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objectId,
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light.Color,
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light.Intensity,
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worldMatrix,
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light.Enabled
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});
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}
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if (gameObject.HasComponent<MetaCoreAnimatorComponent>()) {
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const auto& animator = gameObject.GetComponent<MetaCoreAnimatorComponent>();
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std::string sourceModelPath = animator.SourceModelPath;
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if (sourceModelPath.empty() && gameObject.HasComponent<MetaCoreModelRootTag>()) {
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sourceModelPath = gameObject.GetComponent<MetaCoreModelRootTag>().SourceModelPath;
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}
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snapshot.Animations.push_back(MetaCoreRenderSyncAnimationState{
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objectId,
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animator.SourceModelAssetGuid,
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sourceModelPath,
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animator.ClipIndex,
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animator.RuntimeTimeSeconds,
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animator.Enabled,
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animator.RuntimePlaying,
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animator.Loop,
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animator.Speed
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});
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}
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}
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if (!snapshot.PrimaryCamera.has_value() && !snapshot.Cameras.empty()) {
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const MetaCoreRenderSyncCamera* bestCamera = nullptr;
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for (const MetaCoreRenderSyncCamera& camera : snapshot.Cameras) {
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if (!camera.Enabled) {
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continue;
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}
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if (bestCamera == nullptr || camera.Depth < bestCamera->Depth) {
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bestCamera = &camera;
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}
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}
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if (bestCamera != nullptr) {
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snapshot.PrimaryCamera = *bestCamera;
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}
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}
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return snapshot;
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}
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bool MetaCoreSceneRenderSync::TryBuildSceneViewFromPrimaryCamera(
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const MetaCoreSceneRenderSyncSnapshot& snapshot,
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MetaCoreSceneView& sceneView
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) {
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if (!snapshot.PrimaryCamera.has_value()) {
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return false;
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}
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const MetaCoreRenderSyncCamera& camera = *snapshot.PrimaryCamera;
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return TryBuildSceneViewFromCamera(camera, sceneView);
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}
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bool MetaCoreSceneRenderSync::TryBuildSceneViewFromCamera(
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const MetaCoreRenderSyncCamera& camera,
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MetaCoreSceneView& sceneView
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) {
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if (!camera.Enabled) {
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return false;
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}
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const glm::vec3 cameraPosition = MetaCoreExtractTranslation(camera.WorldMatrix);
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glm::vec3 cameraForward = glm::vec3(camera.WorldMatrix * glm::vec4(0.0F, 0.0F, -1.0F, 0.0F));
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glm::vec3 cameraUp = glm::vec3(camera.WorldMatrix * glm::vec4(0.0F, 1.0F, 0.0F, 0.0F));
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if (!MetaCoreIsUsableDirection(cameraForward)) {
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cameraForward = glm::vec3(0.0F, 0.0F, -1.0F);
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}
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if (!MetaCoreIsUsableDirection(cameraUp)) {
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cameraUp = glm::vec3(0.0F, 1.0F, 0.0F);
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}
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sceneView.CameraPosition = cameraPosition;
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sceneView.CameraTarget = cameraPosition + glm::normalize(cameraForward);
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sceneView.CameraUp = glm::normalize(cameraUp);
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sceneView.VerticalFieldOfViewDegrees = camera.FieldOfViewDegrees;
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sceneView.NearClip = camera.NearClip;
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sceneView.FarClip = camera.FarClip;
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sceneView.ProjectionMode = camera.ProjectionMode;
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sceneView.OrthographicSize = camera.OrthographicSize;
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sceneView.ClearFlags = camera.ClearFlags;
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sceneView.BackgroundColor = camera.BackgroundColor;
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sceneView.BackgroundAlpha = camera.BackgroundAlpha;
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sceneView.CullingMask = camera.CullingMask;
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sceneView.SourceCameraObjectId = camera.ObjectId;
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return true;
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}
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MetaCoreCameraRay MetaCoreScreenPointToRay(
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const MetaCoreSceneView& sceneView,
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const MetaCoreViewportRect& viewportRect,
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const glm::vec2& screenPosition
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) {
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const float width = std::max(1.0F, viewportRect.Width);
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const float height = std::max(1.0F, viewportRect.Height);
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const float localX = std::clamp(screenPosition.x - viewportRect.Left, 0.0F, width);
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const float localY = std::clamp(screenPosition.y - viewportRect.Top, 0.0F, height);
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const float normalizedX = (localX / width) * 2.0F - 1.0F;
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const float normalizedY = 1.0F - (localY / height) * 2.0F;
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const glm::vec3 forward = MetaCoreSafeForward(sceneView);
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const glm::vec3 up = MetaCoreSafeUp(sceneView, forward);
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const glm::vec3 right = glm::normalize(glm::cross(forward, up));
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const float aspectRatio = MetaCoreSafeAspectRatio(width, height);
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if (sceneView.ProjectionMode == MetaCoreCameraProjectionMode::Orthographic) {
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const float halfHeight = std::max(0.0001F, sceneView.OrthographicSize);
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const float halfWidth = halfHeight * aspectRatio;
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return MetaCoreCameraRay{
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sceneView.CameraPosition + right * (normalizedX * halfWidth) + up * (normalizedY * halfHeight),
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forward
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};
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}
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const float fovDegrees = std::clamp(sceneView.VerticalFieldOfViewDegrees, 1.0F, 179.0F);
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const float tanHalfFov = std::tan(glm::radians(fovDegrees) * 0.5F);
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return MetaCoreCameraRay{
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sceneView.CameraPosition,
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glm::normalize(forward + right * (normalizedX * tanHalfFov * aspectRatio) + up * (normalizedY * tanHalfFov))
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};
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}
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std::optional<glm::vec3> MetaCoreWorldToScreenPoint(
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const MetaCoreSceneView& sceneView,
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const MetaCoreViewportRect& viewportRect,
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const glm::vec3& worldPosition
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) {
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const float width = std::max(1.0F, viewportRect.Width);
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const float height = std::max(1.0F, viewportRect.Height);
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const glm::vec3 forward = MetaCoreSafeForward(sceneView);
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const glm::vec3 up = MetaCoreSafeUp(sceneView, forward);
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const glm::mat4 viewMatrix = glm::lookAt(sceneView.CameraPosition, sceneView.CameraTarget, up);
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const glm::mat4 projectionMatrix = MetaCoreBuildProjectionMatrix(sceneView, MetaCoreSafeAspectRatio(width, height));
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const glm::vec4 clipPosition = projectionMatrix * viewMatrix * glm::vec4(worldPosition, 1.0F);
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if (std::abs(clipPosition.w) <= 0.000001F) {
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return std::nullopt;
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}
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const glm::vec3 ndc = glm::vec3(clipPosition) / clipPosition.w;
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if (!std::isfinite(ndc.x) || !std::isfinite(ndc.y) || !std::isfinite(ndc.z)) {
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return std::nullopt;
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}
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return glm::vec3(
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viewportRect.Left + (ndc.x + 1.0F) * 0.5F * width,
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viewportRect.Top + (1.0F - ndc.y) * 0.5F * height,
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ndc.z
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);
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}
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} // namespace MetaCore
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