From e0b1d1fd53fd5b77a3391045ccbf6c82dc7d1785 Mon Sep 17 00:00:00 2001
From: frank <420@shampoo.ooo>
Date: Sat, 13 Nov 2021 14:58:30 -0500
Subject: [PATCH] added rotation to pad transformation, added pointer cursor

---
 config.json                   |  15 +++-
 lib/sb                        |   2 +-
 resource/button/arrow.png     | Bin 0 -> 8140 bytes
 resource/button/home.png      | Bin 0 -> 9290 bytes
 resource/button/inventory.png | Bin 0 -> 5505 bytes
 resource/button/scan.png      | Bin 0 -> 10006 bytes
 src/Pudding.cpp               | 132 ++++++++++++++++++++--------------
 src/Pudding.hpp               |  59 +++++++++------
 8 files changed, 132 insertions(+), 76 deletions(-)
 create mode 100644 resource/button/arrow.png
 create mode 100644 resource/button/home.png
 create mode 100644 resource/button/inventory.png
 create mode 100644 resource/button/scan.png

diff --git a/config.json b/config.json
index f987fb1..bd8e60b 100644
--- a/config.json
+++ b/config.json
@@ -79,6 +79,19 @@
     },
     "resource":
     {
-        "tile-path": "resource/tile"
+        "tile-path": "resource/tile",
+        "button-path": "resource/button"
+    },
+    "interface":
+    {
+        "main-button-y": -0.75,
+        "main-button-single-x": 0.0,
+        "main-button-double-x": 0.65,
+        "main-button-scale": 0.25,
+        "camera-button-label": "scan",
+        "inventory-button-label": "inventory",
+        "arrow-button-location": [0.75, 0.0],
+        "arrow-button-scale": 0.1,
+        "arrow-button-label": "arrow"
     }
 }
diff --git a/lib/sb b/lib/sb
index 03d179e..54cf012 160000
--- a/lib/sb
+++ b/lib/sb
@@ -1 +1 @@
-Subproject commit 03d179eed4c8323576157f806806b214e42d07c7
+Subproject commit 54cf01246b0e5ec81ba5b9158248bca7492823db
diff --git a/resource/button/arrow.png b/resource/button/arrow.png
new file mode 100644
index 0000000000000000000000000000000000000000..fbecee3fd712e3481ab7bb51939408658384204b
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diff --git a/src/Pudding.cpp b/src/Pudding.cpp
index ef47122..0211be3 100644
--- a/src/Pudding.cpp
+++ b/src/Pudding.cpp
@@ -29,33 +29,24 @@ Pudding::Pudding()
 {
     /* subscribe to command events */
     get_delegate().subscribe(&Pudding::respond, this);
+    get_delegate().subscribe(&Pudding::respond, this, SDL_MOUSEMOTION);
     get_delegate().subscribe(&Pudding::respond, this, SDL_MOUSEBUTTONDOWN);
     /* initialize a zbar image scanner for reading barcodes of any format */
     image_scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
     /* set up pudding model */
     nlohmann::json pudding = get_configuration()["pudding"];
-    set_pudding_model(pudding["top-radius"], pudding["base-radius"], pudding["ring-vertex-count"], pudding["layer-count"],
+    load_pudding_model(pudding["top-radius"], pudding["base-radius"], pudding["ring-vertex-count"], pudding["layer-count"],
                       pudding["y-range"][0], pudding["y-range"][1], pudding["gradient-position"]);
     /* loading GL context instead of SDL context for 3D */
     load_gl_context();
     load_tiles();
-    glm::vec3 w = glm::mat3({{1, 0, 0}, {0, 1, 0}, {-0.6739, -0.74, 1}}) * glm::mat3({{.1, 0, 0}, {0, .1 * (460.0 / 768.0), 0}, {0, 0, 1}}) *
-        glm::vec3({-1, -1, 1});
-    std::cout << w << std::endl << glm::translate(glm::vec3{-0.6739, -0.74, 0}) *
-        glm::scale(glm::vec3{.1, .1 * (460.0 / 768.0), 1})  * glm::vec4{-1, -1, 0, 1} << std::endl;
-    Pad p {background.current(), {-0.6739f, -0.74f}, 0.1f, get_display().window_box().aspect(), std::function<void()>()};
-    const std::vector<glm::vec2>& p_position = *p.attributes("position");
-    glm::vec4 final_position = p.transformation() * glm::vec4{p_position[2].x, p_position[2].y, 0, 1};
-    std::cout << p.transformation() << std::endl << final_position << std::endl;
-    assert(final_position == glm::vec4({w.x, w.y, 0, 1}));
-    sb::Texture label {"local/button/scan.png"};
-    label.load();
-    pad.texture(label);
-    pad.transform({-0.6739f, -0.74f}, 0.25f, get_display().window_box().aspect());
+    load_pads();
+    /* Load a pointer cursor from the system library that will be freed automatically */
+    poke = std::shared_ptr<SDL_Cursor>(SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_HAND), SDL_FreeCursor);
 }
 
 /* Assign vertices, colors and texture UV coordinates to the pudding model */
-void Pudding::set_pudding_model(
+void Pudding::load_pudding_model(
     float top_radius, float base_radius, int ring_vertex_count, int layer_count, float min_y, float max_y, float gradient_position)
 {
     size_t ii;
@@ -231,17 +222,31 @@ void Pudding::load_gl_context()
     sb::Log::gl_errors("after uniform locations");
 }
 
-/* Read every resource/tile/.*.jpg into a GL texture, storing the texture pointer and file name in a std::map */
+/* Read every jpg in the folder at tile path into a GL texture and associate with the background object. */
 void Pudding::load_tiles()
 {
     for (fs::path path : sb::glob(get_configuration()["resource"]["tile-path"].get<fs::path>() / ".*.jpg"))
     {
-        sb::Texture texture = sb::Texture(path);
+        sb::Texture texture {path};
         texture.load();
         background.texture(texture, path);
     }
 }
 
+/* Load every png in the button path as a Texture and add to a map. */
+void Pudding::load_pads()
+{
+    for (fs::path path : sb::glob(get_configuration()["resource"]["button-path"].get<fs::path>() / ".*.png"))
+    {
+        labels[path.stem()] = sb::Texture(path);
+        labels[path.stem()].load();
+    }
+    nlohmann::json interface = get_configuration()["interface"];
+    camera_button.texture(labels["scan"]);
+    camera_button.transform({interface["main-button-single-x"], interface["main-button-y"]},
+                            interface["main-button-scale"], window_box().aspect());
+}
+
 /* Try to create cv::VideoCapture object using device ID #0. If successful, this will create GL texture IDs and storage
  * for the camera frames, so it must be called after GL context has been created. Two textures will be created, so they
  * can be used as a double buffer.
@@ -312,15 +317,31 @@ void Pudding::respond(SDL_Event& event)
     {
         background.next();
     }
-    else if (event.type == SDL_MOUSEBUTTONDOWN)
+    /* Mouse interface */
+    else if (event.type == SDL_MOUSEMOTION || event.type == SDL_MOUSEBUTTONDOWN)
     {
-        glm::vec2 gl_coordinates {
-            float(event.button.x) / window_box().width() * 2.0f - 1.0f,
-            (1.0f - float(event.button.y) / window_box().height()) * 2.0f - 1.0f
+        glm::vec2 mouse = event.type == SDL_MOUSEBUTTONDOWN ? glm::vec2{event.button.x, event.button.y} :
+            glm::vec2{event.motion.x, event.motion.y};
+        glm::vec2 ndc {
+            float(mouse.x) / window_box().width() * 2.0f - 1.0f, (1.0f - float(mouse.y) / window_box().height()) * 2.0f - 1.0f
         };
-        if (pad.collide(gl_coordinates))
+        /* Check for collision with the camera button if camera view is open, otherwise check for collision with main viewport. */
+        if ((!capture.isOpened() && camera_button.collide(ndc)) ||
+            (capture.isOpened() && get_display().ndc_subsection(main_viewport).collide(ndc)))
         {
-            camera_switch.toggle();
+            if (SDL_GetCursor() != poke.get())
+            {
+                SDL_SetCursor(poke.get());
+            }
+            if (event.type == SDL_MOUSEBUTTONDOWN)
+            {
+                SDL_SetCursor(SDL_GetDefaultCursor());
+                camera_switch.toggle();
+            }
+        }
+        else if (SDL_GetCursor() == poke.get())
+        {
+            SDL_SetCursor(SDL_GetDefaultCursor());
         }
     }
 }
@@ -793,13 +814,15 @@ void Pudding::update()
         sb::Log::log(message);
     }
     /* viewport box will be used to tell GL where to draw */
-    Box viewport_box = window_box(true);
+    viewport = window_box(true);
     /* shrink viewport if item texture or camera will be displayed */
     if (item_display_active() || capture.isOpened())
     {
-        viewport_box.drag_bottom(0.3f * viewport_box.height());
+        viewport.drag_bottom(0.3f * viewport.height());
     }
-    glViewport(viewport_box);
+    /* Save the main viewport dimensions */
+    main_viewport = viewport;
+    glViewport(viewport);
     glDisable(GL_DEPTH_TEST);
     glClearColor(0, 0, 0, 1);
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -826,7 +849,7 @@ void Pudding::update()
     /* calculate the transformation matrix for displaying pudding in viewport */
     model = glm::rotate(model, weight(get_configuration()["pudding"]["rotation-speed"].get<float>()), Y_UNIT_NORMAL_3D);
     projection = glm::perspective(
-        glm::radians(40.0f * 1 / viewport_box.aspect()), viewport_box.aspect(), 0.1f, 100.0f);
+        glm::radians(40.0f * 1 / viewport.aspect()), viewport.aspect(), 0.1f, 100.0f);
     mvp = projection * VIEW_MATRIX * model;
     /* uniforms */
     glUniform1f(uniform["mvp"]["time"], time_seconds);
@@ -875,8 +898,8 @@ void Pudding::update()
         glUniform1i(uniform["flat"]["texture"], 0);
         glActiveTexture(GL_TEXTURE0);
         /* move viewport to the bottom of screen */
-        viewport_box.top(viewport_box.bottom(), true);
-        viewport_box.bottom(window_box(true).bottom(), true);
+        viewport.top(viewport.bottom(), true);
+        viewport.bottom(window_box(true).bottom(), true);
         /* reset blend to display the original texture colors */
         glUniform3f(uniform["flat"]["blend"], 0.0f, 0.0f, 1.0f);
         /* draw the current item image if we're supposed to */
@@ -885,9 +908,9 @@ void Pudding::update()
             /* shrink viewport to half size if camera will also be displayed */
             if (capture.isOpened())
             {
-                viewport_box.left(viewport_box.cx(), true);
+                viewport.left(viewport.cx(), true);
             }
-            glViewport(viewport_box);
+            glViewport(viewport);
             current_item().current_texture().bind();
             plane.enable();
             /* draws rectangle vertices and rectangle texture using UV coords */
@@ -896,8 +919,8 @@ void Pudding::update()
         /* draw the camera if the camera has been opened */
         if (capture.isOpened())
         {
-            viewport_box.left(window_box(true).left());
-            glViewport(viewport_box);
+            viewport.left(window_box(true).left());
+            glViewport(viewport);
             /* bind texture for drawing */
             camera_view.current().bind();
             camera_view.enable();
@@ -905,16 +928,17 @@ void Pudding::update()
             glDrawArrays(GL_TRIANGLES, 0, camera_view.attributes("position")->count());
         }
     }
-    sb::Log::gl_errors("after capture, before test pad");
-    /* Test Pad */
-    glUseProgram(flat_program);
-    glUniformMatrix4fv(uniform["flat"]["transformation"], 1, GL_FALSE, &pad.transformation()[0][0]);
-    pad.texture().bind();
-    plane.enable();
-    glViewport(window_box(true));
-    glDrawArrays(GL_TRIANGLES, 0, pad.attributes("position")->count());
+    else
+    {
+        /* Draw the camera button if neither the camera or inventory is displayed */
+        glUseProgram(flat_program);
+        glUniformMatrix4fv(uniform["flat"]["transformation"], 1, GL_FALSE, &camera_button.transformation()[0][0]);
+        camera_button.texture().bind();
+        plane.enable();
+        glDrawArrays(GL_TRIANGLES, 0, camera_button.attributes("position")->count());
+    }
     SDL_GL_SwapWindow(get_window());
-    sb::Log::gl_errors("after test pad");
+    sb::Log::gl_errors("at end of update");
     /* add a new item if a new barcode was scanned or entered */
     if (current_barcode != previous_barcode)
     {
@@ -928,21 +952,22 @@ void Pudding::update()
  * is relative to (0.0, 0.0), and the scale is relative to the Plane, which has opposite corners at (-1.0, -1.0) and
  * (1.0, 1.0). * The texture is the graphic that displays in the Pad location. The callback must be a function that
  * doesn't return a value or accept any arguments. */
-Pad::Pad(sb::Texture texture, glm::vec2 offset, float scale, float ratio, std::function<void()> on_connect)
+Pad::Pad(sb::Texture texture, glm::vec2 offset, float scale, float ratio, std::function<void()> on_connect, float rotation)
 {
     this->texture(texture);
-    transform(offset, scale, ratio);
+    transform(offset, scale, ratio, rotation);
     this->on_connect(on_connect);
-    box.gl(true);
+    box.invert_y(true);
 }
 
-/* Set the Pad's transformation matrix based on an offset, a scale, and an aspect ratio. The offset is amount it will
- * be shifted in the (x, y) plane. The scale is a value relative to the (x, y) plane, but it is a single value because
- * the aspect ratio will determine how much each axis is scaled. If the aspect ratio is above one, the x-axis's scale
- * will be divided by the ratio. If the aspect ratio is below one, the y-axis's scale will be multiplied by the aspect
- * ratio. If the aspect ratio of the window is given, this will force the Pad to display as a square, and the ratio
- * will be relative to the shorter axis. */
-void Pad::transform(glm::vec2 offset, float scale, float ratio)
+/* Set the Pad's transformation matrix based on an offset, a scale, an aspect ratio, and a rotation. The offset is the
+ * amount it will be shifted in the (x, y) plane. The scale is a value relative to the (x, y) plane, and it is a single
+ * value because the aspect ratio will determine how much each axis is scaled. If the aspect ratio is above one, the
+ * x-axis's scale will be divided by the ratio. If the aspect ratio is below one, the y-axis's scale will be multiplied
+ * by the aspect ratio. If the aspect ratio of the window is given, this will force the Pad to display as a square, and
+ * the ratio will be relative to the shorter axis. The rotation is an angle in radians to rotate the pad object around
+ * its center after it has been offset and scaled. */
+void Pad::transform(glm::vec2 offset, float scale, float ratio, float rotation)
 {
     glm::vec3 scale_components { scale, scale, 1 };
     if (ratio > 1.0f)
@@ -956,7 +981,8 @@ void Pad::transform(glm::vec2 offset, float scale, float ratio)
     box.size({scale_components.x * 2, scale_components.y * 2});
     box.center(offset);
     std::cout << "pad box is " << box << std::endl;
-    Model::transform(glm::translate(glm::vec3{offset.x, offset.y, 0}) * glm::scale(scale_components));
+    Model::transform(glm::translate(glm::vec3{offset.x, offset.y, 0}) * glm::scale(scale_components) *
+                     glm::rotate(rotation, glm::vec3{0.0f, 0.0f, 1.0f}));
 }
 
 /* Set the function that will run when a pad object is clicked. */
diff --git a/src/Pudding.hpp b/src/Pudding.hpp
index 4d2cce7..f831d63 100644
--- a/src/Pudding.hpp
+++ b/src/Pudding.hpp
@@ -44,8 +44,6 @@
 #include "utility.hpp"
 #include "Box.hpp"
 
-void glViewport(Box);
-
 /* A connection is an object containing a binary state of either on (connected) or off (not connected)
  * and user supplied functions that run automatically on each state change. The functions each have the
  * same return type, number of arguments, and argument types determined by the template arguments.
@@ -180,6 +178,18 @@ public:
  * - Has its own response to click
  * - Shares mouse collision code
  * - Has its own translate + scale transformation
+ *
+ * Example:
+ *
+ * glm::vec3 w = glm::mat3({{1, 0, 0}, {0, 1, 0}, {-0.6739, -0.74, 1}}) * glm::mat3({{.1, 0, 0}, {0, .1 * (460.0 / 768.0), 0}, {0, 0, 1}}) *
+ *     glm::vec3({-1, -1, 1});
+ * std::cout << w << std::endl << glm::translate(glm::vec3{-0.6739, -0.74, 0}) *
+ *     glm::scale(glm::vec3{.1, .1 * (460.0 / 768.0), 1})  * glm::vec4{-1, -1, 0, 1} << std::endl;
+ * Pad p {background.current(), {-0.6739f, -0.74f}, 0.1f, get_display().window_box().aspect(), std::function<void()>()};
+ * const std::vector<glm::vec2>& p_position = *p.attributes("position");
+ * glm::vec4 final_position = p.transformation() * glm::vec4{p_position[2].x, p_position[2].y, 0, 1};
+ * std::cout << p.transformation() << std::endl << final_position << std::endl;
+ * assert(final_position == glm::vec4({w.x, w.y, 0, 1}));
 */
 class Pad : public Plane
 {
@@ -193,8 +203,8 @@ private:
 public:
 
     Pad() {};
-    Pad(sb::Texture, glm::vec2, float, float, callback);
-    void transform(glm::vec2, float, float);
+    Pad(sb::Texture, glm::vec2, float, float, callback, float = 0.0f);
+    void transform(glm::vec2, float, float = 1.0f, float = 0.0f);
     void on_connect(callback);
     bool collide(const glm::vec2&) const;
 
@@ -206,7 +216,7 @@ class Pudding : public Game
 private:
 
     /* Defines for effect IDs that will be passed to the shader program. Since COUNT is last and every value
-     * is the default integer, it will define the number of effects available */
+     * is the default integer, it will be set to the number of effects available. */
     enum Effect
     {
         EFFECT_NONE,
@@ -223,20 +233,21 @@ private:
     };
 
     typedef Game super;
-    const std::string OPEN_FOOD_API_URL = "https://world.openfoodfacts.org/api/v0/product/";
-    const std::string OPEN_PRODUCTS_API_URL = "https://world.openproductsfacts.org/api/v0/product/";
-    const std::string NUTRONIX_API_URL = "https://trackapi.nutritionix.com/v2/search/item?upc=";
-    const std::string BARCODE_MONSTER_API_URL = "https://barcode.monster/api/";
-    const std::string BEST_BUY_API_URL_1 = "https://api.bestbuy.com/v1/products(upc=";
-    const std::string BEST_BUY_API_URL_2 = ")?format=json&apiKey=";
-    const std::string NUTRONIX_NOT_FOUND = "resource not found";
-    const std::string GOOGLE_BOOKS_API_URL = "https://www.googleapis.com/books/v1/volumes?q=isbn:";
-    const std::string GIANTBOMB_API_URL = "https://www.giantbomb.com/api/release/?api_key=";
-    const glm::vec3 ZERO_VECTOR_3D {0, 0, 0};
-    const glm::vec3 Y_UNIT_NORMAL_3D {0, 1, 0};
-    const glm::mat4 VIEW_MATRIX = glm::lookAt({4.0f, 2.0f, 1.0f}, {0.0f, -0.325f, 0.0f}, Y_UNIT_NORMAL_3D);
-    const glm::vec3 PUDDING_BROWN {0.713f, 0.359f, 0.224f};
-    const glm::vec3 PUDDING_YELLOW {0.878f, 0.859f, 0.122f};
+    inline static const std::string OPEN_FOOD_API_URL = "https://world.openfoodfacts.org/api/v0/product/";
+    inline static const std::string OPEN_PRODUCTS_API_URL = "https://world.openproductsfacts.org/api/v0/product/";
+    inline static const std::string NUTRONIX_API_URL = "https://trackapi.nutritionix.com/v2/search/item?upc=";
+    inline static const std::string BARCODE_MONSTER_API_URL = "https://barcode.monster/api/";
+    inline static const std::string BEST_BUY_API_URL_1 = "https://api.bestbuy.com/v1/products(upc=";
+    inline static const std::string BEST_BUY_API_URL_2 = ")?format=json&apiKey=";
+    inline static const std::string NUTRONIX_NOT_FOUND = "resource not found";
+    inline static const std::string GOOGLE_BOOKS_API_URL = "https://www.googleapis.com/books/v1/volumes?q=isbn:";
+    inline static const std::string GIANTBOMB_API_URL = "https://www.giantbomb.com/api/release/?api_key=";
+    inline static const glm::vec3 ZERO_VECTOR_3D {0, 0, 0};
+    inline static const glm::vec3 Y_UNIT_NORMAL_3D {0, 1, 0};
+    inline static const glm::mat4 VIEW_MATRIX = glm::lookAt({4.0f, 2.0f, 1.0f}, {0.0f, -0.325f, 0.0f}, Y_UNIT_NORMAL_3D);
+    inline static const glm::vec3 PUDDING_BROWN {0.713f, 0.359f, 0.224f};
+    inline static const glm::vec3 PUDDING_YELLOW {0.878f, 0.859f, 0.122f};
+    std::shared_ptr<SDL_Cursor> poke;
     std::string current_barcode, previous_barcode, current_config_barcode, current_camera_barcode;
     std::vector<Item> items;
     Carousel item_carousel;
@@ -254,11 +265,14 @@ private:
     SDL_GLContext capture_frame_thread_context = nullptr;
     sb::VAO vao;
     sb::VBO vbo;
-    Pad pad;
+    std::map<std::string, sb::Texture> labels;
+    Pad camera_button, previous_button, next_button, inventory_button;
+    Box viewport, main_viewport;
 
-    void set_pudding_model(float, float, int, int = 1, float = -1.0f, float = 1.0f, float = 0.3f);
+    void load_pudding_model(float, float, int, int = 1, float = -1.0f, float = 1.0f, float = 0.3f);
     void load_gl_context();
     void load_tiles();
+    void load_pads();
     void initialize_camera();
     void incorporate_open_api(Item&, const std::string&);
     void incorporate_nutronix_api(Item&);
@@ -308,4 +322,7 @@ private:
     /* float weighted depression rate */
 };
 
+/* Allow a box object to be passed to glViewport instead of four vertices. */
+void glViewport(Box);
+
 #endif