Created stub 3d space with 2d points

3 files changed, 93 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a5309e6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build*/
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..b99e075
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.16)
+project(derelict)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_EXTENSIONS No)
+find_package(raylib 3 REQUIRED)
+add_executable(
+    ${PROJECT_NAME}
+    main.cpp
+)
+target_link_libraries(${PROJECT_NAME} raylib)
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..dfe0990
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,81 @@
+#include <algorithm>
+#include <cmath>
+#include <vector>
+
+#include <raylib.h>
+
+
+constexpr int AMOUNT {2000};
+
+
+struct Entry
+{
+    Vector2 pos;
+    Vector2 base;
+    float depth;
+};
+
+
+int
+main(int argc, char* argv[])
+{
+    InitWindow(800, 600, "Derelict");
+    SetWindowState(FLAG_WINDOW_RESIZABLE);
+    SetTargetFPS(60);
+    Camera camera {};
+    camera.position = Vector3{10.0, 10.0, 10.0};
+    camera.target = Vector3{0.0, 0.0, 0.0};
+    camera.up = Vector3{0.0, 1.0, 0.0};
+    camera.fovy = 45;
+    camera.projection = CAMERA_PERSPECTIVE;
+    SetCameraMode(camera, CAMERA_ORBITAL);
+    std::vector<Vector3> points;
+    points.reserve(AMOUNT);
+    for (int i = 0; i < AMOUNT; ++i)
+        points.push_back({
+            GetRandomValue(-100, 100) * 0.05f,
+            GetRandomValue(-100, 100) * 0.05f,
+            GetRandomValue(-100, 100) * 0.05f});
+    std::vector<Entry> projected;
+    while (!WindowShouldClose())
+    {
+        UpdateCamera(&camera);
+        projected.clear();
+        projected.reserve(points.size());
+        const int height = GetScreenHeight();
+        const int width = GetScreenWidth();
+        for (const auto& point : points) {
+            const auto vec2 = GetWorldToScreen(point, camera);
+            const float d =
+                std::sqrt(
+                    std::pow(camera.position.x - point.x, 2) +
+                    std::pow(camera.position.y - point.y, 2) +
+                    std::pow(camera.position.z - point.z, 2));
+            if (0 > vec2.x || width < vec2.x || 0 > vec2.y || height < vec2.y)
+                continue;
+            projected.push_back(Entry{
+                vec2, GetWorldToScreen({point.x, 0, point.z}, camera), d
+            });
+        }
+        std::sort(projected.begin(), projected.end(), [](Entry& a, Entry& b){ return a.depth > b.depth; });
+        BeginDrawing();
+        ClearBackground(RAYWHITE);
+        BeginMode3D(camera);
+        DrawGrid(12, 1);
+        EndMode3D();
+        DrawFPS(5, 5);
+        for (const auto& entry : projected) {
+            DrawLine(entry.base.x, entry.base.y, entry.pos.x, entry.pos.y, LIGHTGRAY);
+            DrawCircle(entry.pos.x, entry.pos.y, 3, RED);
+        }
+        int y = 25;
+        for (const auto& entry : projected) {
+            DrawText(TextFormat("%5.1f x %5.1f x %5.1f", entry.pos.x, entry.pos.y, entry.depth), 5, y, 10, DARKGRAY);
+            y += 10;
+            if (y > height)
+                break;
+        }
+        EndDrawing();
+    }
+    CloseWindow();
+}