some code reorganization

[blank.git] / src / world / Entity.cpp

diff --git a/src/world/Entity.cpp b/src/world/Entity.cpp
new file mode 100644 (file)
index 0000000..6b23cac
--- /dev/null
+++ b/src/world/Entity.cpp
@@ -0,0 +1,114 @@
+#include "Entity.hpp"
+
+#include "../model/geometry.hpp"
+#include "../model/Shape.hpp"
+
+#include <cmath>
+#include <glm/gtx/transform.hpp>
+
+namespace {
+
+blank::Model::Buffer model_buffer;
+
+}
+
+namespace blank {
+
+Entity::Entity() noexcept
+: shape(nullptr)
+, model()
+, velocity(0, 0, 0)
+, position(0, 0, 0)
+, chunk(0, 0, 0)
+, angular_velocity(1.0f, 0.0f, 0.0f, 0.0f)
+, rotation(1.0f) {
+
+}
+
+
+void Entity::SetShape(const Shape *s, const glm::vec3 &color) {
+       shape = s;
+       model_buffer.Clear();
+       shape->Vertices(model_buffer.vertices, model_buffer.normals, model_buffer.indices);
+       model_buffer.colors.resize(shape->VertexCount(), color);
+       model.Update(model_buffer);
+}
+
+void Entity::SetShapeless() noexcept {
+       shape = nullptr;
+}
+
+
+void Entity::Velocity(const glm::vec3 &vel) noexcept {
+       velocity = vel;
+}
+
+void Entity::Position(const Block::Pos &pos) noexcept {
+       position = pos;
+       while (position.x >= Chunk::width) {
+               position.x -= Chunk::width;
+               ++chunk.x;
+       }
+       while (position.x < 0) {
+               position.x += Chunk::width;
+               --chunk.x;
+       }
+       while (position.y >= Chunk::height) {
+               position.y -= Chunk::height;
+               ++chunk.y;
+       }
+       while (position.y < 0) {
+               position.y += Chunk::height;
+               --chunk.y;
+       }
+       while (position.z >= Chunk::depth) {
+               position.z -= Chunk::depth;
+               ++chunk.z;
+       }
+       while (position.z < 0) {
+               position.z += Chunk::depth;
+               --chunk.z;
+       }
+}
+
+void Entity::Move(const glm::vec3 &delta) noexcept {
+       Position(position + delta);
+}
+
+void Entity::AngularVelocity(const glm::quat &v) noexcept {
+       angular_velocity = v;
+}
+
+void Entity::Rotation(const glm::mat4 &rot) noexcept {
+       rotation = rot;
+}
+
+void Entity::Rotate(const glm::quat &delta) noexcept {
+       Rotation(rotation * glm::mat4_cast(delta));
+}
+
+glm::mat4 Entity::Transform(const Chunk::Pos &chunk_offset) const noexcept {
+       const glm::vec3 chunk_pos = (chunk - chunk_offset) * Chunk::Extent();
+       return glm::translate(position + chunk_pos) * rotation;
+}
+
+Ray Entity::Aim(const Chunk::Pos &chunk_offset) const noexcept {
+       glm::mat4 transform = Transform(chunk_offset);
+       glm::vec4 from = transform * glm::vec4(0.0f, 0.0f, 0.0f, 1.0f);
+       from /= from.w;
+       glm::vec4 to = transform * glm::vec4(0.0f, 0.0f, -1.0f, 1.0f);
+       to /= to.w;
+       return Ray{ glm::vec3(from), glm::normalize(glm::vec3(to - from)) };
+}
+
+void Entity::Update(int dt) noexcept {
+       Move(velocity * float(dt));
+       Rotate(angular_velocity * float(dt));
+}
+
+
+void Entity::Draw() noexcept {
+       model.Draw();
+}
+
+}