Feat: Image resource example

brenocq/atta#30

image-resource/CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.14)
+project(image-resource VERSION 1.0.0 LANGUAGES CXX)
+find_package(atta 0.1.0.0 REQUIRED)
+
+atta_add_target(projectScript "src/projectScript.cpp")

image-resource/README.md

@@ -0,0 +1,14 @@
+<!--
+title: Image Resource
+description: Introduction to atta images
+image: https://storage.googleapis.com/atta-images/docs/tutorial/image-resource/2022-08-20.gif
+-->
+# Image Resource
+
+<div align="center">
+  <img src="https://storage.googleapis.com/atta-images/docs/tutorial/image-resource/2022-08-20.gif" height="400">
+</div>
+
+Images can be created and updated dynamically in atta.
+
+In this example we create two planes and update their textures dynamically. 

image-resource/src/projectScript.cpp

@@ -0,0 +1,136 @@
+//--------------------------------------------------
+// Image Resource
+// projectScript.cpp
+// Date: 2022-08-19
+// By Breno Cunha Queiroz
+//--------------------------------------------------
+#include "projectScript.h"
+#include <atta/component/interface.h>
+#include <atta/resource/interface.h>
+#include <atta/resource/resources/image.h>
+#include <chrono>
+
+namespace rsc = atta::resource;
+namespace cmp = atta::component;
+const cmp::Entity plane(0);
+
+void Project::onLoad() {
+    rsc::Image::CreateInfo info;
+    info.width = 100;
+    info.height = 100;
+    info.format = rsc::Image::Format::RGBA8;
+    rsc::Image* img = rsc::create<rsc::Image>("animation", info);
+    rsc::Image* gameOfLife = rsc::create<rsc::Image>("gameOfLife", info);
+
+    // Init gameOfLife as white
+    uint8_t* data = gameOfLife->getData();
+    for (int i = 0; i < info.width * info.height * 4; i++)
+        data[i] = 255;
+
+    std::vector<atta::vec2i> blinkers = {{10, 10}, {20, 20}, {10, 20}, {20, 10}};
+    std::vector<atta::vec2i> gliders = {{30, 30}, {20, 50}, {10, 5}, {5, 5}, {80, 30}, {40, 90}, {90, 10}, {90, 50}};
+    std::vector<atta::vec2i> liveCells = {};
+
+    for (atta::vec2i blinker : blinkers) {
+        liveCells.push_back(blinker + atta::vec2i(0, 0));
+        liveCells.push_back(blinker + atta::vec2i(1, 0));
+        liveCells.push_back(blinker + atta::vec2i(0, 1));
+    }
+
+    for (atta::vec2i glider : gliders) {
+        liveCells.push_back(glider + atta::vec2i(0, -1));
+        liveCells.push_back(glider + atta::vec2i(1, 0));
+        liveCells.push_back(glider + atta::vec2i(-1, 1));
+        liveCells.push_back(glider + atta::vec2i(0, 1));
+        liveCells.push_back(glider + atta::vec2i(1, 1));
+    }
+
+    for (atta::vec2i cell : liveCells) {
+        unsigned idx = (cell.y * info.width + cell.x) * 4;
+        data[idx] = data[idx + 1] = data[idx + 2] = 0;
+    }
+
+    gameOfLife->update();
+}
+
+void Project::onAttaLoop() {
+    updateAnimation();
+    updateGameOfLife();
+}
+
+void Project::updateAnimation() {
+    static auto start = std::chrono::system_clock::now();
+    auto end = std::chrono::system_clock::now();
+    int time = std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count() / 50;
+
+    // Change random pattern with time
+    rsc::Image* img = rsc::get<rsc::Image>("animation");
+    uint32_t w = img->getWidth();
+    uint32_t h = img->getHeight();
+    uint8_t* data = img->getData();
+    for (int i = 0; i < w * h * 4; i++)
+        data[i] = 255;
+
+    for (int y = 0; y < h; y++)
+        for (int x = 0; x < w; x++) {
+            int X = x + time;
+            int Y = y + time * 2;
+            X %= w;
+            Y %= h;
+            uint32_t idx = (w * Y + X) * 4;
+            data[idx + 0] = 255 * sin(x / float(w) * M_PI * 5);
+            data[idx + 1] = 255 * sin(y / float(h) * M_PI * 5);
+            data[idx + 2] = 255;
+        }
+    img->update();
+}
+
+void Project::updateGameOfLife() {
+    static auto start = std::chrono::system_clock::now();
+    auto end = std::chrono::system_clock::now();
+    int time = std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count()/100;
+
+    // Update every second
+    if (time > 0) {
+        start = end;
+
+        rsc::Image* gameOfLife = rsc::get<rsc::Image>("gameOfLife");
+        uint32_t w = gameOfLife->getWidth();
+        uint32_t h = gameOfLife->getHeight();
+        uint8_t* data = gameOfLife->getData();
+
+        uint8_t* backup = new uint8_t[w * h * 4];
+        for (int i = 0; i < w * h * 4; i++)
+            backup[i] = data[i];
+
+        for (int y = 0; y < h; y++) {
+            for (int x = 0; x < w; x++) {
+                int idx = (y * w + x) * 4;
+                int numNeighbors = 0;
+                bool isAlive = backup[idx] == 0;
+                // Count neightbors
+                for (int yn = y - 1; yn <= y + 1; yn++)
+                    for (int xn = x - 1; xn <= x + 1; xn++) {
+                        // Ignore center
+                        if (yn == y && xn == x)
+                            continue;
+                        // Wrap coord
+                        int X = (xn + w) % w;
+                        int Y = (yn + h) % h;
+                        if (backup[(Y * w + X) * 4] == 0)
+                            numNeighbors++;
+                    }
+
+                // Update cell
+                if (isAlive && (numNeighbors == 2 || numNeighbors == 3))
+                    continue;
+                else if (!isAlive && numNeighbors == 3)
+                    data[idx] = data[idx + 1] = data[idx + 2] = 0;
+                else
+                    data[idx] = data[idx + 1] = data[idx + 2] = 255;
+            }
+        }
+        delete[] backup;
+        gameOfLife->update();
+    }
+}

image-resource/src/projectScript.h

@@ -0,0 +1,25 @@
+//--------------------------------------------------
+// Image Resource
+// projectScript.h
+// Date: 2022-08-19
+// By Breno Cunha Queiroz
+//--------------------------------------------------
+#ifndef PROJECT_SCRIPT_H
+#define PROJECT_SCRIPT_H
+#include <atta/script/projectScript.h>
+
+namespace scr = atta::script;
+
+class Project : public scr::ProjectScript {
+  public:
+    void onLoad() override;
+    void onAttaLoop() override;
+
+  private:
+    void updateAnimation();
+    void updateGameOfLife();
+};
+
+ATTA_REGISTER_PROJECT_SCRIPT(Project)
+
+#endif // PROJECT_SCRIPT_H

logging/src/projectScript.h

@@ -10,12 +10,11 @@
 
 namespace scr = atta::script;
 
-class Project : public scr::ProjectScript
-{
-public:
-	void onLoad() override;
+class Project : public scr::ProjectScript {
+  public:
+    void onLoad() override;
 };
 
 ATTA_REGISTER_PROJECT_SCRIPT(Project)
 
-#endif// PROJECT_SCRIPT_H
+#endif // PROJECT_SCRIPT_H

materials/CMakeLists.txt → material-resource/CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.14)
-project(materials VERSION 1.0.0 LANGUAGES CXX)
+project(material-resource VERSION 1.0.0 LANGUAGES CXX)
 find_package(atta 0.1.0.0 REQUIRED)
 
 # Download resources

materials/README.md → material-resource/README.md

@@ -1,12 +1,12 @@
 <!--
-title: Materials
+title: Material Resource
 description: Introduction to atta materials
-image: https://storage.googleapis.com/atta-images/docs/tutorial/materials/2022-08-19.png
+image: https://storage.googleapis.com/atta-images/docs/tutorial/material-resource/2022-08-19.png
 -->
-# Materials
+# Material Resource
 
 <div align="center">
-  <img src="https://storage.googleapis.com/atta-images/docs/tutorial/materials/2022-08-19.png" height="400">
+  <img src="https://storage.googleapis.com/atta-images/docs/tutorial/material-resource/2022-08-19.png" height="400">
 </div>
 
 Entities are only rendered with a material if they also have `cmp::Transform` and `cmp::Mesh` components.