From 3cea406fd92ac6a534ed42a4ceb4e1b79b3ea373 Mon Sep 17 00:00:00 2001
From: Piotr <mev_lyshkin@protonmail.com>
Date: Wed, 23 Sep 2020 16:33:46 +0200
Subject: [PATCH] Start creating client

---
 src/example_client.rs | 61 +++++++++++++++++++++++++++++++++++++++++++
 src/gaia/client.rs    |  7 +++++
 src/gaia/engine.rs    | 13 ++++++---
 src/gaia/mod.rs       |  1 +
 src/main.rs           |  2 ++
 5 files changed, 80 insertions(+), 4 deletions(-)
 create mode 100644 src/example_client.rs
 create mode 100644 src/gaia/client.rs

diff --git a/src/example_client.rs b/src/example_client.rs
new file mode 100644
index 0000000..649f1be
--- /dev/null
+++ b/src/example_client.rs
@@ -0,0 +1,61 @@
+
+use crate::gaia::camera::*;
+use crate::gaia::consts;
+use crate::gaia::*;
+#[macro_use]
+use crate::gaia::macros;
+use crate::gaia::engine::Engine;
+use crate::gaia::client::Client;
+use cgmath::{perspective, vec3, Deg, Matrix4, Point3, Rad, Vector3};
+macro_rules! c_str {
+    ($literal:expr) => {
+        std::ffi::CStr::from_bytes_with_nul_unchecked(concat!($literal, "\0").as_bytes())
+    };
+}
+
+pub struct ExampleClient {
+    model: model::Model,
+    camera: Camera,
+    shader: shader::Shader,
+}
+
+impl ExampleClient {
+    pub fn create() -> ExampleClient {
+        ExampleClient {
+            model: model::Model::new("resources/objects/nanosuit/nanosuit.obj"),
+            camera: Camera {
+                position: Point3::new(0.0, 0.0, 3.0),
+                ..Camera::default()
+            },
+            shader: shader::Shader::from_file(
+                "resources/shaders/model_loading.vs",
+                "resources/shaders/model_loading.fs",
+            ),
+        }
+    }
+}
+
+impl Client for ExampleClient {
+    unsafe fn draw(&mut self) {
+        self.shader.useProgram();
+
+        // view/projection transformations
+        let projection: Matrix4<f32> = perspective(
+            Deg(self.camera.Zoom),
+            consts::SCR_WIDTH as f32 / consts::SCR_HEIGHT as f32,
+            0.1,
+            100.0,
+        );
+        let view = self.camera.get_view_matrix();
+        self.shader.setMat4(c_str!("projection"), &projection);
+        self.shader.setMat4(c_str!("view"), &view);
+
+        let mut m = Matrix4::<f32>::from_translation(vec3(3.0, -1.75, -1.25)); // translate it down so it's at the center of the scene
+        m = m * Matrix4::from_scale(0.2); // it's a bit too big for our scene, so scale it down
+        self.shader.setMat4(c_str!("model"), &m);
+        self.model.Draw(&self.shader);
+    }
+    fn update(&mut self, engine: &mut Engine) {
+
+    }
+}
\ No newline at end of file
diff --git a/src/gaia/client.rs b/src/gaia/client.rs
new file mode 100644
index 0000000..e3c92f7
--- /dev/null
+++ b/src/gaia/client.rs
@@ -0,0 +1,7 @@
+use crate::gaia::engine::Engine;
+
+pub trait Client {
+    fn update(&mut self, engine: &mut Engine);
+    // fn draw<T>(&mut self, engine: &mut Engine<T>) where T: Client;
+    unsafe fn draw(&mut self);
+}
\ No newline at end of file
diff --git a/src/gaia/engine.rs b/src/gaia/engine.rs
index d9eae62..c9cadeb 100644
--- a/src/gaia/engine.rs
+++ b/src/gaia/engine.rs
@@ -2,6 +2,8 @@ use crate::gaia::bg_info::BgInfo;
 use crate::gaia::camera::*;
 use crate::gaia::consts;
 use crate::gaia::*;
+use crate::example_client::ExampleClient;
+use crate::gaia::client::Client;
 use cgmath::{perspective, vec3, Deg, Matrix4, Point3, Rad, Vector3};
 use imgui_glfw_rs::glfw;
 use imgui_glfw_rs::glfw::{Action, Context, Key};
@@ -20,6 +22,7 @@ pub struct Engine {
     pub imgui_glfw: ImguiGLFW,
     pub shader: shader::Shader,
     pub models: Vec<model::Model>,
+    pub client: Box<dyn Client>,
 }
 
 impl Engine {
@@ -91,6 +94,7 @@ impl Engine {
                     m.Draw(&self.shader);
                     i = i + 1;
                 }
+                self.client.draw();
             }
 
             // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
@@ -247,10 +251,6 @@ impl Default for Engine {
         unsafe{gl::Enable(gl::DEPTH_TEST);}
 
         Engine {
-            camera: Camera {
-                position: Point3::new(0.0, 0.0, 3.0),
-                ..Camera::default()
-            },
             bg_info: BgInfo::default(),
             window: window,
             window_size: (consts::SCR_WIDTH as f32, consts::SCR_HEIGHT as f32),
@@ -258,8 +258,13 @@ impl Default for Engine {
             glfw: glfw,
             imgui: imgui,
             imgui_glfw: imgui_glfw,
+            camera: Camera {
+                position: Point3::new(0.0, 0.0, 3.0),
+                ..Camera::default()
+            },
             shader: shader::Shader::default(),
             models: vec![],
+            client: Box::new(ExampleClient::create()),
         }
     }
 }
diff --git a/src/gaia/mod.rs b/src/gaia/mod.rs
index b26d114..5422105 100644
--- a/src/gaia/mod.rs
+++ b/src/gaia/mod.rs
@@ -1,4 +1,5 @@
 pub mod camera;
+pub mod client;
 pub mod consts;
 pub mod utils;
 #[macro_use]
diff --git a/src/main.rs b/src/main.rs
index 66906db..9546d3a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,7 +5,9 @@ extern crate image;
 extern crate imgui_glfw_rs;
 use human_panic::setup_panic;
 mod gaia;
+mod example_client;
 use crate::gaia::engine::Engine;
+use crate::example_client::ExampleClient;
 
 pub fn main() {
     setup_panic!();