let camera move-able.

src/camera.cc

@@ -3,8 +3,19 @@
 
 #include "camera.h"
 
+#include "spdlog/spdlog.h"
+
 Camera::Camera(const Vector3d &up)
-    : position_(Point3d::Identity()), gaze_(Vector3d::Identity()), up_(up) {}
+    : gaze_(Vector3d::Identity()), up_(up), camera_speed_(0.3) {}
+
+Camera::Camera(const Vector3d &up, const float camera_speed)
+    : gaze_(Vector3d::Identity()), up_(up), camera_speed_(camera_speed) {}
+
+void Camera::move(const Point3d &offset) {
+  position_ = (offset * camera_speed_);
+}
+
+void Camera::set_gaze(const Vector3d &gaze) { gaze_ = gaze.normalized(); }
 
 TransformMatrix Camera::get_view_transform() const {
   // Move camera to origin

src/camera.h

@@ -6,18 +6,19 @@
 class Camera {
 public:
   explicit Camera(const Vector3d &up);
+  explicit Camera(const Vector3d &up, const float camera_speed);
 
 public:
   TransformMatrix get_view_transform() const;
 
 public:
-  void set_position(const Point3d &position) {
+  void move(const Point3d &offset);
-    position_ = position.normalized();
+  void set_gaze(const Vector3d &gaze);
-  }
-  void set_gaze(const Vector3d &gaze) { gaze_ = gaze.normalized(); }
 
 private:
   Point3d position_;
   Vector3d gaze_;
   Vector3d up_;
+
+  float camera_speed_;
 };

src/main.cc

@@ -1,8 +1,6 @@
 // Copyright 2024 SquareBlock Inc. All Rights Reserved.
 // Author: tianlei.richard@qq.com (tianlei.richard)
 
-#include <opencv2/core/core.hpp>
-
 #include "imgui.h"
 #include "imgui_impl_opengl3.h"
 #include "imgui_impl_sdl2.h"
@@ -44,6 +42,8 @@ int main(int argc, char *argv[]) {
   const float aspect_ratio = static_cast<float>(resolution_width) /
                              static_cast<float>(resolution_height);
 
+  const float camera_speed = 1.0;
+
   const std::string window_name{"Minor Render"};
 
   // Setup SDL
@@ -107,12 +107,12 @@ int main(int argc, char *argv[]) {
   // Our state
   ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
 
-  Camera camera{Vector3d{0, 1, 0}};
+  Camera camera{Vector3d{0, 1, 0}, camera_speed};
   MinusRenderer renderer{near, far, fov, aspect_ratio};
   renderer.set_meshes(
       Mesh::load_mesh(obj_path, {{Texture::DiffuseMap, diffuse_map_path}}));
   TransformMatrix translate{
-      {1., 0., 0., 3.}, {0., 1., 0., 3.}, {0., 0., 1., -4.}, {0., 0., 0., 1.}};
+      {1., 0., 0., 3.}, {0., 1., 0., 3.}, {0., 0., 1., -5.}, {0., 0., 0., 1.}};
   renderer.model_transform(translate);
 
   // Main loop
@@ -145,25 +145,41 @@ int main(int argc, char *argv[]) {
     // 2. Show a simple window that we create ourselves. We use a Begin/End pair
     // to create a named window.
     {
-      TransformMatrix move2origin{
+      ImGui::Begin(window_name.c_str()); // Create a window
-          {1, 0, 0, 0}, {0, 1, 0, -3}, {0, 0, 1, 4}, {0, 0, 0, 1}};
-      TransformMatrix rotation{
-          Eigen::Transform<double, 3, Eigen::Affine>(
-              Eigen::AngleAxisd(0.0625 * M_PI, Eigen::Vector3d::UnitX())
-                  .toRotationMatrix())
-              .matrix()};
-      TransformMatrix move_back{
-          {1, 0, 0, 0}, {0, 1, 0, 3}, {0, 0, 1, -4}, {0, 0, 0, 1}};
-      renderer.model_transform(move_back * rotation * move2origin);
 
-      camera.set_position(Point3d{0, 0, 0});
+      // TransformMatrix move2origin{
+      //     {1, 0, 0, 0}, {0, 1, 0, -3}, {0, 0, 1, 5.}, {0, 0, 0, 1}};
+      // TransformMatrix rotation{
+      //     Eigen::Transform<double, 3, Eigen::Affine>(
+      //         Eigen::AngleAxisd(0.0625 * M_PI, Eigen::Vector3d::UnitX())
+      //             .toRotationMatrix())
+      //         .matrix()};
+      // TransformMatrix move_back{
+      //     {1, 0, 0, 0}, {0, 1, 0, 3}, {0, 0, 1, -5.}, {0, 0, 0, 1}};
+      // renderer.model_transform(move_back * rotation * move2origin);
+
+      if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) {
+        Point3d offset{0, 0, 0};
+        if (ImGui::IsKeyPressed(ImGuiKey_A)) {
+          offset.x() -= 1;
+        } else if (ImGui::IsKeyPressed(ImGuiKey_S)) {
+          offset.z() += 1;
+        } else if (ImGui::IsKeyPressed(ImGuiKey_D)) {
+          offset.x() += 1;
+        } else if (ImGui::IsKeyPressed(ImGuiKey_W)) {
+          offset.z() -= 1;
+        } else if (ImGui::IsKeyPressed(ImGuiKey_E)) {
+          offset.y() += 1;
+        } else if (ImGui::IsKeyPressed(ImGuiKey_Q)) {
+          offset.y() -= 1;
+        }
+        camera.move(offset);
+      }
       camera.set_gaze(Vector3d{0, 0, -1});
       renderer.view_transform(camera.get_view_transform());
 
       const auto &image = renderer.render(resolution_width, resolution_height);
 
-      ImGui::Begin(window_name.c_str()); // Create a window
-
       GLuint texture;
       glGenTextures(1, &texture);
       glBindTexture(GL_TEXTURE_2D, texture);

src/minus_renderer.cc

@@ -135,7 +135,8 @@ cv::Mat MinusRenderer::render(const int resolution_width,
       construct_transform(resolution_width, resolution_height);
 
   Rasterizer rasterizer{resolution_width, resolution_height};
-  for (int mesh_index = 0; mesh_index < meshes_.size(); ++mesh_index) {
+  for (decltype(meshes_)::size_type mesh_index = 0; mesh_index < meshes_.size();
+       ++mesh_index) {
     auto primitives = (meshes_[mesh_index]).get_primitives();
     for (auto &t : primitives) {
       t.set_points(apply_transform(ss_transform, t.get_vertex_position()));
@@ -147,8 +148,8 @@ cv::Mat MinusRenderer::render(const int resolution_width,
   assert(!shading_points.empty());
   cv::Mat color_image(shading_points.size(), (shading_points[0]).size(),
                       CV_8UC3);
-  for (int y = 0; y < shading_points.size(); ++y) {
+  for (size_t y = 0; y < shading_points.size(); ++y) {
-    for (int x = 0; x < shading_points[y].size(); ++x) {
+    for (size_t x = 0; x < shading_points[y].size(); ++x) {
       auto &pixel_color =
           color_image.at<cv::Vec3b>(shading_points.size() - y - 1, x);
       pixel_color = cv::Vec3b(0, 0, 0);

src/phone_material.h

@@ -4,7 +4,6 @@
 #pragma once
 
 #include <filesystem>
-#include <opencv2/core/core.hpp>
 #include <vector>
 
 #include "common.h"

src/rasterizer.h

@@ -3,7 +3,6 @@
 
 #pragma once
 
-#include "mesh.h"
 #include "triangle.h"
 #include <opencv2/core/core.hpp>
 #include <vector>

src/texture.cc

@@ -12,7 +12,7 @@ Texture::Texture(const std::filesystem::path &texture_path) {
     throw std::filesystem::filesystem_error("File not found",
                                             std::error_code{});
   }
-  texture_ = (cv::imread(texture_path));
+  texture_ = (cv::imread(texture_path.c_str()));
   spdlog::debug("Texture at {}, shape: ({},{})", texture_path.c_str(),
                 texture_.cols, texture_.rows);
 }

src/texture.h

@@ -4,7 +4,6 @@
 #pragma once
 
 #include <filesystem>
-#include <opencv2/core/core.hpp>
 
 #include "common.h"