added CC0 assets from kenney.nl to replace the existing ones

Reviewed-on: #3

Pull request needs revised naming for the example but seems good to go and inlined. Thanks

.clang-format

@@ -1,10 +1,8 @@
----
 # We'll use defaults from the LLVM style, but with 4 columns indentation.
 BasedOnStyle: LLVM
 IndentWidth: 4
----
+
 Language: Cpp
 # Force pointers to the type for C++.
 DerivePointerAlignment: false
 PointerAlignment: Left
----

.gitignore

@@ -1,2 +1,3 @@
 build
 .vscode
+/.vs

README.de.md

@@ -0,0 +1,41 @@
+# ParadiSO - eine minimale 2D-Grafikengine
+
+**ParadiSO** wurde als stark abgespeckte 2D-Version meiner `pixwerx`-Engine konzipiert. _ParadiSO_ verfolgt einen minimalistischen Ansatz für 2D-Grafik zu Bildungszwecken. Es verwendet modernes C++ und ein datengetriebenes Design, jedoch keine ECS (Entity Component System).
+
+## Bildungszwecke
+
+Einige Argumente für seinen Bildungsaspekt:
+
+-   Kombination verschiedener Konzepte und Paradigmen zur Erstellung ausdrucksstarker, aber knappen Codes
+-   Stark von Rust-Code inspiriert
+-   Für den mathematischen Code wird eine sofortige Auswertung verwendet (keine Expression-Templates), jedoch mit der Verwendung von `constexpr`, um eventuelle Performance-Overheads auszugleichen und optimale Vektorisierung zu erreichen.
+-   Versteckt alte `C`-APIs hinter einer modernisierten Fassade
+-   Es lehnt sich stark an die STL und ihre Algorithmen an
+
+## Minimalistisch
+
+Da diese Engine einige Muster und Designkonzepte zeigen soll, versucht sie, unnötigen Ballast zu vermeiden.
+
+## Abhängigkeiten
+
+ParadiSO wird mit den notwendigen Komponenten geliefert. Diese sollte jedoch hier erwähnt werden:
+
+-   [GLFW 3.3.8](https://github.com/glfw/glfw)
+-   [GLAD](https://github.com/Dav1dde/glad)
+-   [STB image](https://github.com/nothings/stb)
+
+## Toolchains
+
+ParadiSO kann auf verschiedenen Plattformen gebaut werden
+
+-   Windows (Visual Studio Build Tools 2022)
+-   MacOS (clang 14 or later)
+-   Linux (clang 14 or later, gcc 13.2.1)
+
+Andere Kombinationen sind möglich aber nicht getestet.
+
+## Beiträge
+
+-   [Tim Götzelmann](https://code.technotecture.net/Timeplex) Windows Build
+-   [Robin Rottstädt](https://code.technotecture.net/robin_rottstaedt) Flappy Bird Clone, Bitmap Loader
+-   [brxxh](https://code.technotecture.net/brxxh) Flappy Bird Clone

README.md

@@ -1,16 +1,16 @@
-# ParadisSO - a minimal 2D graphics engine
+# ParadiSO - a minimal 2D graphics engine
 
-**ParadiSO** was conceived as a heavily stripped down 2D version of my `pixwerx` engine. *ParadiSO* mimics a minimalistic approach to 2D graphics for educational purposes. It uses modern C++ and a data-driven design, but no ECS. 
+**ParadiSO** was conceived as a heavily stripped down 2D version of my `pixwerx` engine. _ParadiSO_ mimics a minimalistic approach to 2D graphics for educational purposes. It uses modern C++ and a data-driven design, but no ECS.
 
 ## Educational
 
 Some arguments for its educational side:
 
-* mix and match of various concepts and paradigms to write expressive but concise code 
+-   mix and match of various concepts and paradigms to write expressive but concise code
-* heavily inspired by Rust code
+-   heavily inspired by Rust code
-* math code is eager evaluation but `constexpr` to compensate overheads
+-   math code is eager evaluation but `constexpr` to compensate overheads
-* hides old-style `C` APIs behind a renovated facade
+-   hides old-style `C` APIs behind a renovated facade
-* it leans heavily on the STL and its algorithms 
+-   it leans heavily on the STL and its algorithms
 
 ## Minimal
 
@@ -20,6 +20,22 @@ Because this engine should show some patterns and design concepts it tries to av
 
 ParadiSO comes with batteries included. However, it should be mentioned here:
 
-* [GLFW 3.3.8](https://github.com/glfw/glfw)
+-   [GLFW 3.3.8](https://github.com/glfw/glfw)
-* [GLAD](https://github.com/Dav1dde/glad)
+-   [GLAD](https://github.com/Dav1dde/glad)
+-   [STB image](https://github.com/nothings/stb)
 
+## Toolchains
+
+ParadiSO is being developed to work on all major desktop systems.
+
+-   Windows (Visual Studio Build Tools 2022)
+-   MacOS (clang 14 or later)
+-   Linux (clang 14 or later, gcc 13.2.1)
+
+Other combinations might work but are untested.
+
+## Contributors
+
+-   [Tim Götzelmann](https://code.technotecture.net/Timeplex) Windows Build
+-   [Robin Rottstädt](https://code.technotecture.net/robin_rottstaedt) Flappy Bird Clone, Bitmap Loader
+-   [brxxh](https://code.technotecture.net/brxxh) Flappy Bird Clone

docs/README.md

@@ -0,0 +1,50 @@
+# Todo
+
+Here some ideas for improving this tiny engine:
+
+## Rendering
+- [ ] replace the OpenGL renderer with a Vulkan backend
+- [ ] add animatable sprites (access to UV mapping and tiling)
+- [ ] add a SDF based renderer (parametric tiles and font rendering)
+
+## Game Support
+- [ ] audio!
+- [ ] some minimal animation system with tweening with different f-curves
+
+
+## System Level
+
+- [ ] add a `Asset` handler to load cache and manage assets
+- [ ] introspection of file system if we load assset
+
+## Design
+
+- [ ] replace some of the 'unkown source' assets
+
+## Build / Dev Support
+- [ ] add a test rig either with Snitch or Catch2
+- [ ] write some reasonable testcases
+- [ ] add CPU and GPU benchmarks to address various issues
+
+
+# Issues
+
+
+```sh
+ Performance counter stats for 'bin/paradiso_pong':
+
+            555,35 msec task-clock:u                     #    0,042 CPUs utilized
+                 0      context-switches:u               #    0,000 /sec
+                 0      cpu-migrations:u                 #    0,000 /sec
+             4.072      page-faults:u                    #    7,332 K/sec
+       319.484.735      cycles:u                         #    0,575 GHz
+       358.165.995      instructions:u                   #    1,12  insn per cycle
+        86.037.942      branches:u                       #  154,926 M/sec
+         2.469.068      branch-misses:u                  #    2,87% of all branches
+
+      13,092775373 seconds time elapsed
+
+       0,311565000 seconds user
+       0,247491000 seconds sys
+```
+above run with `perf stat bin/paradiso_pong` shows some really bad performance issues.

examples/CMakeLists.txt

@@ -1,2 +1,3 @@
 add_subdirectory(simple)
 add_subdirectory(pong)
+add_subdirectory(quickwings)

examples/pong/pong.cpp

@@ -1,7 +1,7 @@
 /**
  * paradiso - Paradigmen der Softwareentwicklung
  *
- * (c) Copyright 2023 Hartmut Seichter
+ * (c) Copyright 2023-2024 Hartmut Seichter
  *
  */
 
@@ -16,7 +16,6 @@
 
 #include <unordered_map>
 
-#include <iomanip>
 #include <iostream>
 
 struct PongStage {
@@ -86,7 +85,7 @@ struct PongPaddle {
         velocity_horizontal *= whoopiness;
         sprite.pivot.x() += velocity_horizontal;
 
-        std::clamp(sprite.pivot.x(), -0.5f, 0.5f);
+        sprite.pivot.x() = std::clamp(sprite.pivot.x(), -0.5f, 0.5f);
 
         // update shader uniforms
         shader.set_uniform("pivot", sprite.pivot);
@@ -151,7 +150,7 @@ struct PongBall {
 
     void draw(const paradiso::Shader& shader) {
 
-        std::clamp(sprite.pivot.x(), -0.5f, 0.5f);
+        sprite.pivot.x() = std::clamp(sprite.pivot.x(), -0.5f, 0.5f);
 
         // update shader uniforms
         shader.set_uniform("pivot", sprite.pivot);
@@ -166,6 +165,9 @@ struct PongBall {
     paradiso::Renderer renderer{};
 
     constexpr void push(const auto& impulse) noexcept { velocity += impulse; }
+
+    constexpr void whoop(const auto& whoopiness) noexcept { velocity *= whoopiness; }
+
 };
 
 auto main() -> int {
@@ -234,6 +236,19 @@ auto main() -> int {
                 ball.sprite.pivot.x() =  0.0f;
                 ball.sprite.pivot.y() =  0.9f;
             }
+            // speed adjust
+            if (w.keyboard_input().top().key == 'N') {
+
+                std::cout << "Speed Up!\n";
+
+                ball.push(paradiso::Vector2<float>::make(0.f,0.01f));
+
+            } else if (w.keyboard_input().top().key == 'M') {
+
+                ball.push(paradiso::Vector2<float>::make(0.f,-0.01f));
+
+                std::cout << "Speed Lower!\n";
+            }
         }
 
         ball.interact(stage);

examples/quickwings/CMakeLists.txt

@@ -0,0 +1,20 @@
+set(quickwings_srcs quickwings.cpp)
+set(quickwings_assets
+    assets/background-day.png
+    assets/base.png
+    assets/pipe-green.png
+    assets/yellowbird-downflap.png
+    assets/yellowbird-midflap.png
+    assets/yellowbird-upflap.png
+    )
+
+set_source_files_properties(${quickwings_assets} PROPERTIES HEADER_FILE_ONLY TRUE)
+
+add_executable(quickwings ${quickwings_srcs} ${quickwings_assets})
+
+target_link_libraries(quickwings paradiso_core)
+
+add_custom_command(TARGET quickwings POST_BUILD
+                   COMMAND ${CMAKE_COMMAND} -E copy_directory
+                   ${CMAKE_CURRENT_SOURCE_DIR}/assets/ $<TARGET_FILE_DIR:quickwings>/assets)
+                

examples/quickwings/assets/tappybird/Spritesheet/planes.xml

@@ -0,0 +1,14 @@
+<TextureAtlas imagePath="sheet.png">
+	<SubTexture name="planeBlue1.png" x="0" y="73" width="88" height="73"/>
+	<SubTexture name="planeBlue2.png" x="0" y="0" width="88" height="73"/>
+	<SubTexture name="planeBlue3.png" x="0" y="365" width="88" height="73"/>
+	<SubTexture name="planeGreen1.png" x="88" y="219" width="88" height="73"/>
+	<SubTexture name="planeGreen2.png" x="88" y="146" width="88" height="73"/>
+	<SubTexture name="planeGreen3.png" x="88" y="73" width="88" height="73"/>
+	<SubTexture name="planeRed1.png" x="88" y="0" width="88" height="73"/>
+	<SubTexture name="planeRed2.png" x="0" y="438" width="88" height="73"/>
+	<SubTexture name="planeRed3.png" x="88" y="292" width="88" height="73"/>
+	<SubTexture name="planeYellow1.png" x="0" y="292" width="88" height="73"/>
+	<SubTexture name="planeYellow2.png" x="0" y="219" width="88" height="73"/>
+	<SubTexture name="planeYellow3.png" x="0" y="146" width="88" height="73"/>
+</TextureAtlas>

examples/quickwings/assets/tappybird/Spritesheet/sheet.xml

@@ -0,0 +1,81 @@
+<TextureAtlas imagePath="sheet.png">
+	<SubTexture name="UIbg.png" x="0" y="986" width="264" height="264"/>
+	<SubTexture name="background.png" x="0" y="355" width="800" height="480"/>
+	<SubTexture name="buttonLarge.png" x="0" y="1250" width="196" height="70"/>
+	<SubTexture name="buttonSmall.png" x="0" y="1320" width="136" height="80"/>
+	<SubTexture name="groundDirt.png" x="0" y="0" width="808" height="71"/>
+	<SubTexture name="groundGrass.png" x="0" y="142" width="808" height="71"/>
+	<SubTexture name="groundIce.png" x="0" y="71" width="808" height="71"/>
+	<SubTexture name="groundRock.png" x="0" y="284" width="808" height="71"/>
+	<SubTexture name="groundSnow.png" x="0" y="213" width="808" height="71"/>
+	<SubTexture name="letterA.png" x="412" y="835" width="61" height="64"/>
+	<SubTexture name="letterB.png" x="487" y="1537" width="50" height="66"/>
+	<SubTexture name="letterC.png" x="460" y="977" width="52" height="66"/>
+	<SubTexture name="letterD.png" x="432" y="1613" width="54" height="66"/>
+	<SubTexture name="letterE.png" x="511" y="1965" width="45" height="64"/>
+	<SubTexture name="letterF.png" x="512" y="963" width="44" height="64"/>
+	<SubTexture name="letterG.png" x="460" y="1107" width="52" height="66"/>
+	<SubTexture name="letterH.png" x="473" y="835" width="51" height="64"/>
+	<SubTexture name="letterI.png" x="524" y="835" width="22" height="64"/>
+	<SubTexture name="letterJ.png" x="512" y="1027" width="42" height="66"/>
+	<SubTexture name="letterK.png" x="432" y="1821" width="53" height="64"/>
+	<SubTexture name="letterL.png" x="512" y="899" width="44" height="64"/>
+	<SubTexture name="letterM.png" x="392" y="1967" width="66" height="64"/>
+	<SubTexture name="letterN.png" x="432" y="1679" width="53" height="64"/>
+	<SubTexture name="letterO.png" x="418" y="1284" width="60" height="66"/>
+	<SubTexture name="letterP.png" x="489" y="1427" width="48" height="65"/>
+	<SubTexture name="letterQ.png" x="418" y="1205" width="60" height="79"/>
+	<SubTexture name="letterR.png" x="478" y="1249" width="51" height="65"/>
+	<SubTexture name="letterS.png" x="511" y="1899" width="46" height="66"/>
+	<SubTexture name="letterT.png" x="460" y="1043" width="52" height="64"/>
+	<SubTexture name="letterU.png" x="485" y="1757" width="51" height="66"/>
+	<SubTexture name="letterV.png" x="400" y="913" width="61" height="64"/>
+	<SubTexture name="letterW.png" x="136" y="1320" width="76" height="64"/>
+	<SubTexture name="letterX.png" x="418" y="1409" width="58" height="64"/>
+	<SubTexture name="letterY.png" x="432" y="1473" width="57" height="64"/>
+	<SubTexture name="letterZ.png" x="486" y="1613" width="50" height="64"/>
+	<SubTexture name="medalBronze.png" x="0" y="1400" width="114" height="119"/>
+	<SubTexture name="medalGold.png" x="0" y="1519" width="114" height="119"/>
+	<SubTexture name="medalSilver.png" x="0" y="1638" width="114" height="119"/>
+	<SubTexture name="number0.png" x="432" y="1743" width="53" height="78"/>
+	<SubTexture name="number1.png" x="512" y="1093" width="37" height="76"/>
+	<SubTexture name="number2.png" x="477" y="1350" width="51" height="77"/>
+	<SubTexture name="number3.png" x="485" y="1679" width="51" height="78"/>
+	<SubTexture name="number4.png" x="432" y="1537" width="55" height="76"/>
+	<SubTexture name="number5.png" x="485" y="1823" width="50" height="76"/>
+	<SubTexture name="number6.png" x="432" y="1885" width="53" height="77"/>
+	<SubTexture name="number7.png" x="478" y="1173" width="51" height="76"/>
+	<SubTexture name="number8.png" x="461" y="899" width="51" height="78"/>
+	<SubTexture name="number9.png" x="458" y="1962" width="53" height="77"/>
+	<SubTexture name="planeBlue1.png" x="330" y="1371" width="88" height="73"/>
+	<SubTexture name="planeBlue2.png" x="372" y="1132" width="88" height="73"/>
+	<SubTexture name="planeBlue3.png" x="222" y="1562" width="88" height="73"/>
+	<SubTexture name="planeGreen1.png" x="114" y="1639" width="88" height="73"/>
+	<SubTexture name="planeGreen2.png" x="216" y="1951" width="88" height="73"/>
+	<SubTexture name="planeGreen3.png" x="222" y="1489" width="88" height="73"/>
+	<SubTexture name="planeRed1.png" x="216" y="1878" width="88" height="73"/>
+	<SubTexture name="planeRed2.png" x="372" y="1059" width="88" height="73"/>
+	<SubTexture name="planeRed3.png" x="372" y="986" width="88" height="73"/>
+	<SubTexture name="planeYellow1.png" x="304" y="1967" width="88" height="73"/>
+	<SubTexture name="planeYellow2.png" x="330" y="1298" width="88" height="73"/>
+	<SubTexture name="planeYellow3.png" x="330" y="1225" width="88" height="73"/>
+	<SubTexture name="puffLarge.png" x="114" y="1712" width="42" height="35"/>
+	<SubTexture name="puffSmall.png" x="196" y="1250" width="25" height="21"/>
+	<SubTexture name="rock.png" x="114" y="1400" width="108" height="239"/>
+	<SubTexture name="rockDown.png" x="324" y="1489" width="108" height="239"/>
+	<SubTexture name="rockGrass.png" x="0" y="1757" width="108" height="239"/>
+	<SubTexture name="rockGrassDown.png" x="264" y="986" width="108" height="239"/>
+	<SubTexture name="rockIce.png" x="216" y="1639" width="108" height="239"/>
+	<SubTexture name="rockIceDown.png" x="222" y="1250" width="108" height="239"/>
+	<SubTexture name="rockSnow.png" x="324" y="1728" width="108" height="239"/>
+	<SubTexture name="rockSnowDown.png" x="108" y="1757" width="108" height="239"/>
+	<SubTexture name="starBronze.png" x="170" y="1996" width="39" height="37"/>
+	<SubTexture name="starGold.png" x="369" y="1444" width="39" height="37"/>
+	<SubTexture name="starSilver.png" x="330" y="1444" width="39" height="37"/>
+	<SubTexture name="tap.png" x="156" y="1712" width="40" height="40"/>
+	<SubTexture name="tapLeft.png" x="0" y="1996" width="85" height="42"/>
+	<SubTexture name="tapRight.png" x="85" y="1996" width="85" height="42"/>
+	<SubTexture name="tapTick.png" x="418" y="1350" width="59" height="59"/>
+	<SubTexture name="textGameOver.png" x="0" y="835" width="412" height="78"/>
+	<SubTexture name="textGetReady.png" x="0" y="913" width="400" height="73"/>
+</TextureAtlas>