allow multiple meshes per entity

[blank.git] / src / model / CompositeModel.cpp

diff --git a/src/model/CompositeModel.cpp b/src/model/CompositeModel.cpp
new file mode 100644 (file)
index 0000000..d5b25af
--- /dev/null
+++ b/src/model/CompositeModel.cpp
@@ -0,0 +1,55 @@
+#include "CompositeModel.hpp"
+
+#include "EntityModel.hpp"
+#include "../graphics/DirectionalLighting.hpp"
+
+#include <glm/gtx/quaternion.hpp>
+
+
+namespace blank {
+
+CompositeModel::CompositeModel()
+: node_model(nullptr)
+, position(0.0f)
+, orientation(1.0f, 0.0f, 0.0f, 0.0f)
+, parts() {
+
+}
+
+
+CompositeModel &CompositeModel::AddPart() {
+       parts.emplace_back();
+       parts.back().parent = this;
+       return parts.back();
+}
+
+
+glm::mat4 CompositeModel::LocalTransform() const noexcept {
+       glm::mat4 transform(toMat4(orientation));
+       transform[3].x = position.x;
+       transform[3].y = position.y;
+       transform[3].z = position.z;
+       return transform;
+}
+
+glm::mat4 CompositeModel::GlobalTransform() const noexcept {
+       if (HasParent()) {
+               return Parent().GlobalTransform() * LocalTransform();
+       } else {
+               return LocalTransform();
+       }
+}
+
+
+void CompositeModel::Render(const glm::mat4 &M, DirectionalLighting &prog) const {
+       glm::mat4 transform(M * LocalTransform());
+       if (HasNodeModel()) {
+               prog.SetM(transform);
+               NodeModel().Draw();
+       }
+       for (const CompositeModel &part : parts) {
+               part.Render(transform, prog);
+       }
+}
+
+}