Adds the files from the previous project. Adds buttons to the view :D!

BoxCar2D.xcodeproj/project.pbxproj

@@ -7,8 +7,16 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
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+		42409A2218EAD10900B43925 /* Car.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 42409A1A18EAD10900B43925 /* Car.cpp */; };
-		4280D42D18E831D200E4CDFB /* Fractal-iOS.vsh in Resources */ = {isa = PBXBuildFile; fileRef = 4280D42918E831A900E4CDFB /* Fractal-iOS.vsh */; };
+		42409A2318EAD10900B43925 /* Car.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 42409A1A18EAD10900B43925 /* Car.cpp */; };
+		42409A2418EAD10900B43925 /* Drawer.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 42409A1C18EAD10900B43925 /* Drawer.cpp */; };
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+		42409A2A18EAD10900B43925 /* plain.vsh in Resources */ = {isa = PBXBuildFile; fileRef = 42409A2118EAD10900B43925 /* plain.vsh */; };
+		42409A2F18EAD36000B43925 /* plain-iOS.fsh in Resources */ = {isa = PBXBuildFile; fileRef = 42409A2C18EAD36000B43925 /* plain-iOS.fsh */; };
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-		4295A2FB18CBC15000A58D8F /* Fractal.fsh in Resources */ = {isa = PBXBuildFile; fileRef = 4295A2F818CBC00500A58D8F /* Fractal.fsh */; };
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@@ -31,6 +37,16 @@
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+		42409A1A18EAD10900B43925 /* Car.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = Car.cpp; path = GLEssentials/Car.cpp; sourceTree = "<group>"; };
+		42409A1B18EAD10900B43925 /* Car.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = Car.h; path = GLEssentials/Car.h; sourceTree = "<group>"; };
+		42409A1C18EAD10900B43925 /* Drawer.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = Drawer.cpp; path = GLEssentials/Drawer.cpp; sourceTree = "<group>"; };
+		42409A1D18EAD10900B43925 /* Drawer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = Drawer.h; path = GLEssentials/Drawer.h; sourceTree = "<group>"; };
+		42409A1E18EAD10900B43925 /* Path.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = Path.cpp; path = GLEssentials/Path.cpp; sourceTree = "<group>"; };
+		42409A1F18EAD10900B43925 /* Path.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = Path.h; path = GLEssentials/Path.h; sourceTree = "<group>"; };
+		42409A2018EAD10900B43925 /* plain.fsh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.glsl; name = plain.fsh; path = GLEssentials/plain.fsh; sourceTree = "<group>"; };
+		42409A2118EAD10900B43925 /* plain.vsh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.glsl; name = plain.vsh; path = GLEssentials/plain.vsh; sourceTree = "<group>"; };
+		42409A2C18EAD36000B43925 /* plain-iOS.fsh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.glsl; name = "plain-iOS.fsh"; path = "GLEssentials/plain-iOS.fsh"; sourceTree = "<group>"; };
+		42409A2D18EAD36000B43925 /* plain-iOS.vsh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.glsl; name = "plain-iOS.vsh"; path = "GLEssentials/plain-iOS.vsh"; sourceTree = "<group>"; };
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@@ -44,8 +60,6 @@
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-		4280D42918E831A900E4CDFB /* Fractal-iOS.vsh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.glsl; name = "Fractal-iOS.vsh"; path = "GLEssentials/Fractal-iOS.vsh"; sourceTree = "<group>"; };
 		4280D43718E839C100E4CDFB /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; name = Images.xcassets; path = GLEssentials/Images.xcassets; sourceTree = "<group>"; };
 		4295A2C218CB4E5100A58D8F /* FullscreenWindow.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = FullscreenWindow.h; path = GLEssentials/OSX/FullscreenWindow.h; sourceTree = "<group>"; };
 		4295A2C318CB4E5100A58D8F /* FullscreenWindow.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = FullscreenWindow.m; path = GLEssentials/OSX/FullscreenWindow.m; sourceTree = "<group>"; };
@@ -58,8 +72,6 @@
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 		4295A2F018CBB1D200A58D8F /* BoxCar2D-Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = "BoxCar2D-Info.plist"; path = "GLEssentials/OSX/BoxCar2D-Info.plist"; sourceTree = "<group>"; };
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-		4295A2F618CBBFF100A58D8F /* Fractal.vsh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.glsl; name = Fractal.vsh; path = GLEssentials/Fractal.vsh; sourceTree = "<group>"; };
-		4295A2F818CBC00500A58D8F /* Fractal.fsh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.glsl; name = Fractal.fsh; path = GLEssentials/Fractal.fsh; sourceTree = "<group>"; };
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@@ -85,18 +97,24 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
-		080E96DDFE201D6D7F000001 /* GLEssentials */ = {
+		080E96DDFE201D6D7F000001 /* BoxCar2D */ = {
 			isa = PBXGroup;
 			children = (
+				42409A2C18EAD36000B43925 /* plain-iOS.fsh */,
+				42409A2D18EAD36000B43925 /* plain-iOS.vsh */,
+				42409A2018EAD10900B43925 /* plain.fsh */,
+				42409A2118EAD10900B43925 /* plain.vsh */,
+				42409A1A18EAD10900B43925 /* Car.cpp */,
+				42409A1B18EAD10900B43925 /* Car.h */,
+				42409A1C18EAD10900B43925 /* Drawer.cpp */,
+				42409A1D18EAD10900B43925 /* Drawer.h */,
+				42409A1E18EAD10900B43925 /* Path.cpp */,
+				42409A1F18EAD10900B43925 /* Path.h */,
 				4295A2DE18CB68A400A58D8F /* Game.h */,
 				4295A2DF18CB68A400A58D8F /* Game.mm */,
-				4295A2F618CBBFF100A58D8F /* Fractal.vsh */,
-				4295A2F818CBC00500A58D8F /* Fractal.fsh */,
-				4280D42818E831A900E4CDFB /* Fractal-iOS.fsh */,
-				4280D42918E831A900E4CDFB /* Fractal-iOS.vsh */,
 				4280D42718E8314A00E4CDFB /* Supporting Files */,
 			);
-			name = GLEssentials;
+			name = BoxCar2D;
 			sourceTree = "<group>";
 		};
 		19C28FACFE9D520D11CA2CBB /* Products */ = {
@@ -112,7 +130,7 @@
 			isa = PBXGroup;
 			children = (
 				4280D43718E839C100E4CDFB /* Images.xcassets */,
-				080E96DDFE201D6D7F000001 /* GLEssentials */,
+				080E96DDFE201D6D7F000001 /* BoxCar2D */,
 				4280D3EB18E8307A00E4CDFB /* Frameworks */,
 				19C28FACFE9D520D11CA2CBB /* Products */,
 				FE3E0DDD70A6476884E69727 /* Pods-OSX.xcconfig */,
@@ -251,10 +269,10 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				42409A2F18EAD36000B43925 /* plain-iOS.fsh in Resources */,
 				4280D42F18E831D200E4CDFB /* Main_iPad.storyboard in Resources */,
+				42409A3118EAD36000B43925 /* plain-iOS.vsh in Resources */,
 				4280D43018E831D200E4CDFB /* Main_iPhone.storyboard in Resources */,
-				4280D42D18E831D200E4CDFB /* Fractal-iOS.vsh in Resources */,
-				4280D42C18E831C900E4CDFB /* Fractal-iOS.fsh in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -264,8 +282,8 @@
 			files = (
 				4280D43818E839C100E4CDFB /* Images.xcassets in Resources */,
 				4295A2F318CBB22800A58D8F /* MainMenu.xib in Resources */,
-				4295A2FA18CBC15000A58D8F /* Fractal.vsh in Resources */,
+				42409A2A18EAD10900B43925 /* plain.vsh in Resources */,
-				4295A2FB18CBC15000A58D8F /* Fractal.fsh in Resources */,
+				42409A2818EAD10900B43925 /* plain.fsh in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -339,10 +357,13 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				42409A2518EAD10900B43925 /* Drawer.cpp in Sources */,
 				4280D43218E8321100E4CDFB /* main.m in Sources */,
 				4280D43318E8321100E4CDFB /* AppDelegate.m in Sources */,
+				42409A2718EAD10900B43925 /* Path.cpp in Sources */,
 				4280D43418E8321100E4CDFB /* ViewController.m in Sources */,
 				4280D43118E8321100E4CDFB /* Game.mm in Sources */,
+				42409A2318EAD10900B43925 /* Car.cpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -350,10 +371,13 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				42409A2218EAD10900B43925 /* Car.cpp in Sources */,
 				4295A2EB18CBB0F700A58D8F /* main.m in Sources */,
 				4295A2CA18CB4E5100A58D8F /* FullscreenWindow.m in Sources */,
 				4295A2CB18CB4E5100A58D8F /* GLView.m in Sources */,
+				42409A2418EAD10900B43925 /* Drawer.cpp in Sources */,
 				4295A2CC18CB4E5100A58D8F /* WindowController.m in Sources */,
+				42409A2618EAD10900B43925 /* Path.cpp in Sources */,
 				4295A2E018CB68A400A58D8F /* Game.mm in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -447,7 +471,6 @@
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_WARN_OBJC_IMPLICIT_ATOMIC_PROPERTIES = YES;
-				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_OPTIMIZATION_LEVEL = 0;
@@ -474,10 +497,10 @@
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_WARN_OBJC_IMPLICIT_ATOMIC_PROPERTIES = YES;
-				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				ENABLE_NS_ASSERTIONS = NO;
 				GCC_C_LANGUAGE_STANDARD = c99;
+				GCC_PREPROCESSOR_DEFINITIONS = "NDEBUG=1";
 				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
 				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;

GLEssentials/Car.cpp

@@ -0,0 +1,257 @@
+//
+//  Car.cpp
+//  OSXGLEssentials
+//
+//  Created by Joshua Moerman on 10/03/14.
+//
+//
+
+#include "Car.h"
+
+#include <vector>
+#include <random>
+#include <functional>
+#include <iostream>
+
+static float get_rand(float min, float max){
+    return min + (rand() / float(RAND_MAX)) * (max - min);
+}
+
+struct WheelGenome {
+    float speed;
+    float radius;
+};
+
+std::ostream & operator<<(std::ostream& out, WheelGenome const & g){
+    return out << "(W speed=" << g.speed << " radius=" << g.radius << ")";
+}
+
+struct StickGenome {
+    float angle;
+    float limit;
+    float width;
+    float length;
+    
+    std::vector<WheelGenome> wheel;
+    std::vector<StickGenome> sticks;
+};
+
+std::ostream & operator<<(std::ostream& out, StickGenome const & g){
+    out << "(S angle=" << g.angle << " limit=" << g.limit << " width=" << g.width << " length=" << g.length;
+    out << " wheel=";
+    for(auto&& w : g.wheel) out << w;
+    out << " sticks=";
+    for(auto&& s : g.sticks) out << s;
+    return out << ")";
+}
+
+struct CarGenome {
+    std::vector<StickGenome> sticks;
+};
+
+std::ostream & operator<<(std::ostream& out, CarGenome const & g){
+    out << "(C sticks=";
+    for(auto&& s : g.sticks) out << s;
+    return out << ")";
+}
+
+struct GenomeCreator {
+    std::mt19937 generator{37};
+    std::uniform_real_distribution<float> distribution_float{0.0, 1.0};
+    std::uniform_int_distribution<int> distribution_int{0, 4};
+    std::uniform_int_distribution<int> distribution_bool{0, 1};
+    std::function<float()> r = std::bind(distribution_float, generator);
+    std::function<int()> s = std::bind(distribution_int, generator);
+    std::function<int()> w = std::bind(distribution_bool, generator);
+    float min = 0.05f;
+    
+    WheelGenome wheel(){
+        WheelGenome g;
+        g.speed = r() * 20 + 10;
+        g.radius = r() + min;
+        return g;
+    }
+    
+    StickGenome stick(){
+        StickGenome g;
+        g.angle = r() * 2 * M_PI;
+        g.limit = r() * 0.05f * M_PI;
+        g.width = r() * 0.2f + min;
+        g.length = r() * 5 + 1;
+        if(w()){
+            g.wheel.push_back(wheel());
+        } else {
+            auto sticks = s() - 1;
+            while(sticks-- > 0){
+                g.sticks.push_back(stick());
+            }
+        }
+        return g;
+    }
+    
+    CarGenome car(){
+        CarGenome g;
+        auto sticks = s() + 1;
+        while(sticks-- > 0){
+            g.sticks.push_back(stick());
+        }
+        return g;
+    }
+};
+
+static GenomeCreator creator;
+
+struct CarBuilder {
+    b2World & world;
+    
+    b2CircleShape wheelShape;
+    b2FixtureDef wheelFixture;
+    b2BodyDef wheelBody;
+    
+    b2PolygonShape stickShape;
+    b2FixtureDef stickFixture;
+    b2BodyDef stickBody;
+    
+    b2PolygonShape boxShape;
+    b2FixtureDef boxFixture;
+    b2BodyDef boxBody;
+    
+    b2RevoluteJointDef motor;
+    b2RevoluteJointDef stickJoint;
+    
+    std::vector<b2Body*> created_parts;
+    
+    CarBuilder(b2World & world_)
+    : world(world_)
+    {
+        // constants
+        wheelFixture.shape = &wheelShape;
+        wheelFixture.density = 1.0f;
+        wheelFixture.friction = 1.0f;
+        wheelFixture.restitution = 0.1f;
+        wheelFixture.filter.groupIndex = -1;
+        
+        wheelBody.type = b2_dynamicBody;
+        
+        stickFixture.shape = &stickShape;
+        stickFixture.density = 2.0f;
+        stickFixture.friction = 0.7f;
+        stickFixture.filter.groupIndex = -1;
+        
+        stickBody.type = b2_dynamicBody;
+        
+        boxShape.SetAsBox(0.05, 0.05);
+        
+        boxFixture.shape = &boxShape;
+        boxFixture.density = 2000.0f;
+        boxFixture.friction = 0.3f;
+        boxFixture.filter.groupIndex = -1;
+        
+        boxBody.type = b2_dynamicBody;
+        
+        motor.maxMotorTorque = 100;
+        motor.enableMotor = true;
+        
+        //stickJoint.enableLimit = true;
+        stickJoint.enableMotor = true;
+        stickJoint.maxMotorTorque = 1000;
+        stickJoint.motorSpeed = get_rand(-1, 2);
+    }
+    
+    b2Body * createWheel(WheelGenome const & g){
+        wheelShape.m_radius = g.radius;
+        
+        auto body = world.CreateBody(&wheelBody);
+        body->CreateFixture(&wheelFixture);
+        created_parts.push_back(body);
+        return body;
+    }
+    
+    b2Body * createStick(StickGenome const & g){
+        stickShape.SetAsBox(0.5 * g.length, 0.5 * g.width);
+        
+        auto body = world.CreateBody(&stickBody);
+        body->CreateFixture(&stickFixture);
+        created_parts.push_back(body);
+        
+        for(auto&& wg : g.wheel){
+            auto wheel = createWheel(wg);
+            wheel->SetTransform({g.length, 0.0}, 0);
+            
+            motor.localAnchorA = {0.5f * g.length, 0};
+            motor.bodyA = body;
+            motor.bodyB = wheel;
+            motor.motorSpeed = -wg.speed; // CCW
+            
+            world.CreateJoint(&motor);
+        }
+        for(auto&& sg : g.sticks){
+            auto stick = createStick(sg);
+            float startAngle = sg.angle;
+            stick->SetTransform({g.length, 0.0}, startAngle);
+            
+            stickJoint.localAnchorA = {0.5f * g.length, 0};
+            stickJoint.localAnchorB = {-0.5f * sg.length, 0};
+            stickJoint.bodyA = body;
+            stickJoint.bodyB = stick;
+            stickJoint.lowerAngle = startAngle - sg.limit;
+            stickJoint.upperAngle = startAngle + sg.limit;
+            stickJoint.referenceAngle = startAngle;
+            
+            world.CreateJoint(&stickJoint);
+        }
+        
+        return body;
+    }
+    
+    b2Body * createCar(CarGenome const & g){
+        created_parts.clear();
+        auto body = world.CreateBody(&boxBody);
+        body->CreateFixture(&boxFixture);
+        created_parts.push_back(body);
+        
+        for(auto&& sg : g.sticks){
+            auto stick = createStick(sg);
+            float startAngle = sg.angle;
+            stick->SetTransform({sg.length, 0.0}, startAngle);
+            
+            stickJoint.localAnchorA = {0, 0};
+            stickJoint.localAnchorB = {-0.5f * sg.length, 0};
+            stickJoint.bodyA = body;
+            stickJoint.bodyB = stick;
+            stickJoint.lowerAngle = startAngle - sg.limit;
+            stickJoint.upperAngle = startAngle + sg.limit;
+            stickJoint.referenceAngle = startAngle;
+            
+            world.CreateJoint(&stickJoint);
+        }
+        
+        return body;
+    }
+};
+
+Car::Car(b2World & world_)
+: world(world_)
+{
+    auto genome = creator.car();
+    CarBuilder builder(world);
+    
+    body = builder.createCar(genome);
+    parts.swap(builder.created_parts);
+}
+
+Car::Car(Car&& c)
+: world(c.world)
+, body(c.body)
+, parts(std::move(c.parts))
+{}
+
+Car::~Car(){
+    for(auto&& p : parts){
+        world.DestroyBody(p);
+    }
+}
+
+b2Vec2 Car::getPosition() const {
+    return body->GetPosition();
+}

GLEssentials/Car.h

@@ -0,0 +1,26 @@
+//
+//  Car.h
+//  OSXGLEssentials
+//
+//  Created by Joshua Moerman on 10/03/14.
+//
+//
+
+#pragma once
+
+#include <Box2D/Box2D.h>
+#include <vector>
+
+struct Car {
+    Car(b2World & world);
+    Car(Car&& c);
+    Car(Car const & c) = delete;
+    ~Car();
+    
+    b2Vec2 getPosition() const;
+
+private:
+    b2World & world;
+    b2Body * body = nullptr;
+    std::vector<b2Body*> parts;
+};

GLEssentials/Drawer.cpp

@@ -0,0 +1,156 @@
+//
+//  Drawer.cpp
+//  OSXGLEssentials
+//
+//  Created by Joshua Moerman on 10/03/14.
+//
+//
+
+#include "Drawer.h"
+
+#include <moggle/math/projection.hpp>
+#include <moggle/math/transformation.hpp>
+
+using namespace moggle;
+
+// We need to pass relative addresses to opengl
+#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+
+// We may assume this at some point
+static_assert(sizeof(Vertex) == 6*4, "wrong size");
+
+// Circles
+static constexpr size_t circleVertices = 13;
+static const Vertex::Position (&getCircle())[circleVertices]{
+    static Vertex::Position vertices[circleVertices];
+    static bool shouldInit = true;
+    if(shouldInit){
+        for(int i = 0; i < circleVertices;++i){
+            auto phi = 2 * i / double(circleVertices-1) * M_PI;
+            vertices[i] = {cos(phi), -sin(phi)};
+        }
+        shouldInit = false;
+    }
+    return vertices;
+}
+
+static const float viewSize = 20.0;
+
+#if TARGET_OS_IPHONE
+static const char * file = "/plain-iOS";
+#else
+static const char * file = "/plain";
+#endif
+
+// Implementation
+Drawer::Drawer(std::string const & bundle){
+    gl::enable(GL_BLEND);
+    gl::blend_function(GL_SRC_ALPHA, GL_ONE);
+    
+    gl::clear_color(0.2f, 0.05f, 0.05f, 1.0f);
+    
+    projection = projection_matrices::orthographic(-viewSize, viewSize, -viewSize, viewSize, -1, 1);
+    
+    auto vertex = shader::from_file(shader_type::vertex, bundle + file + ".vsh");
+    auto fragment = shader::from_file(shader_type::fragment, bundle + file + ".fsh");
+    
+    program.attach(vertex);
+    program.attach(fragment);
+    
+    program.bind_attribute(0, "position");
+    program.bind_attribute(1, "color");
+    
+    program.link();
+    
+    gl::generate_vertex_arrays(1, &vao);
+    gl::bind_vertex_array(vao);
+    
+    gl::generate_buffers(1, &buf);
+    gl::bind_buffer(GL_ARRAY_BUFFER, buf);
+}
+
+void Drawer::draw(){
+    // bug when going to fullscreen
+    // possibly related http://lists.apple.com/archives/mac-opengl/2012/Jul/msg00041.html
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    if(glGetError() != GL_NO_ERROR) return;
+    
+    matrix4<float> mvp = projection * transformation_matrices::translate(-camera);
+    
+    program.use();
+    program.uniform<matrix4<float>>("mvp").set(mvp);
+    
+    if(!segments.empty()){
+        if(verbose) printf("drawing %lu objects and %lu segments\n", sizes.size(), segments.size());
+        
+        gl::bind_vertex_array(vao);
+        gl::bind_buffer(GL_ARRAY_BUFFER, buf);
+        gl::buffer_data(GL_ARRAY_BUFFER, sizeof(Vertex) * segments.size(), &segments[0], GL_STATIC_DRAW);
+        
+        gl::enable_vertex_attribute_array(0);
+        gl::enable_vertex_attribute_array(1);
+        gl::vertex_attribute_pointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), BUFFER_OFFSET(0));
+        gl::vertex_attribute_pointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), BUFFER_OFFSET(3*4));
+        
+        GLuint start = 0;
+        for(auto&& s : sizes){
+            gl::draw_arrays(GL_LINE_LOOP, start, s);
+            start += s;
+        }
+    }
+}
+
+void Drawer::clear(){
+    sizes.clear();
+    segments.clear();
+}
+
+void Drawer::resize(float width, float height){
+    auto aspect = width / height;
+    auto hheight = viewSize;
+    projection = projection_matrices::orthographic(-hheight * aspect, hheight * aspect, -hheight, hheight, -5, 5);
+}
+
+void Drawer::DrawPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color){
+    if(verbose) printf("polygon (not solid)\n  %d vertices\n  %f %f %f\n", vertexCount, color.r, color.g, color.b);
+    for(int i = 0; i < vertexCount; ++i){
+        segments.push_back(Vertex{convert(vertices[i]), convert(color)});
+    }
+    sizes.emplace_back(vertexCount);
+}
+
+void Drawer::DrawSolidPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color){
+    if(verbose) printf("polygon (solid, deferred)\n");
+    DrawPolygon(vertices, vertexCount, color);
+}
+
+void Drawer::DrawCircle(const b2Vec2& center, float32 radius, const b2Color& color){
+    if(verbose) printf("circle (not solid)\n  at %f %f (%f)\n  %f %f %f\n", center.x, center.y, radius, color.r, color.g, color.b);
+    for(auto&& p : getCircle()){
+        segments.push_back(Vertex{convert(center) + radius * p, convert(color)});
+    }
+    sizes.emplace_back(circleVertices);
+}
+
+void Drawer::DrawSolidCircle(const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color& color){
+    if(verbose) printf("circle (solid, deferred)\n");
+    segments.push_back(Vertex{convert(center) - radius * convert(axis), convert(color)});
+    segments.push_back(Vertex{convert(center) + radius * convert(axis), convert(color)});
+    sizes.push_back(2);
+    DrawCircle(center, radius, color);
+}
+
+void Drawer::DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color){
+    if(verbose) printf("segment\n  %f %f -> %f %f\n  %f %f %f\n", p1.x, p1.y, p2.x, p2.y, color.r, color.g, color.b);
+    segments.push_back(Vertex{convert(p1), convert(color)});
+    segments.push_back(Vertex{convert(p2), convert(color)});
+    sizes.emplace_back(2);
+}
+
+void Drawer::DrawTransform(const b2Transform& xf){
+    if(verbose) printf("transform\n");
+}
+
+
+
+

GLEssentials/Drawer.h

@@ -0,0 +1,66 @@
+//
+//  Drawer.h
+//  OSXGLEssentials
+//
+//  Created by Joshua Moerman on 10/03/14.
+//
+//
+
+#pragma once
+
+#include <Box2D/Box2D.h>
+
+#include <moggle/core/gl.hpp>
+#include <moggle/math/matrix.hpp>
+#include <moggle/core/shader.hpp>
+
+#include <vector>
+
+struct Vertex {
+    using Position = moggle::vector3<float>;
+    using Color = moggle::vector3<float>;
+    
+    Position position;
+    Color color;
+};
+
+inline moggle::vector3<float> convert(b2Vec2 const & p){ return {p.x, p.y, 0.0f}; }
+inline moggle::vector3<float> convert(b2Color const & p){ return {p.r, p.g, p.b}; }
+
+struct Drawer : b2Draw {
+    // camera position
+    Vertex::Position camera = {0, 0};
+    
+    // print debugging info
+    bool verbose = false;
+    
+    // bundle needed to load shaders
+    Drawer(std::string const & bundle);
+    
+    // draw buffer
+    void draw();
+    
+    // clear buffer
+    void clear();
+    
+    // resize any stuff
+    void resize(float width, float height);
+    
+    // Box 2D drawing interface
+    // Implementation will fill its buffers
+	virtual void DrawPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color) override;
+	virtual void DrawSolidPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color) override;
+	virtual void DrawCircle(const b2Vec2& center, float32 radius, const b2Color& color) override;
+	virtual void DrawSolidCircle(const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color& color) override;
+	virtual void DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color) override;
+	virtual void DrawTransform(const b2Transform& xf) override;
+
+private:
+    moggle::shader_program program;
+    moggle::matrix4<float> projection;
+    std::vector<Vertex> segments;
+    std::vector<GLuint> sizes;
+    GLuint vao, buf;
+};
+
+

GLEssentials/Fractal-iOS.fsh

@@ -1,22 +0,0 @@
-#version 100
-
-varying highp vec2 pos;
-varying highp vec2 start;
-
-void main(){
-    
-    highp vec2 z = start;
-    
-    int i = 0;
-    for (i = 0; i < 7; i++) {
-        highp vec2 zsq = z*z;
-        if(zsq.x + zsq.y > 16.0) break;
-        
-        highp float t = zsq.x - zsq.y + pos.x;
-        z.y = 2.0*z.x*z.y + pos.y;
-        z.x = t;
-    }
-    
-    gl_FragColor = vec4(float(i) / 7.0);
-    gl_FragColor.bg = 0.5 * sin(z) + 0.5;
-}

GLEssentials/Fractal-iOS.vsh

@@ -1,18 +0,0 @@
-#version 100
-
-uniform float rotation;
-
-attribute vec4 position;
-attribute vec4 color;
-
-varying vec2 pos;
-varying vec2 start;
-
-void main(){
-    pos = position.xy;
-    pos.x -= 0.5;
-    
-    start = sqrt(1.0 + 0.01 * rotation) * 0.3 * sin(vec2(0.1, 0.1337) * rotation);
-    
-    gl_Position = position;
-}

GLEssentials/Fractal.fsh

@@ -1,26 +0,0 @@
-#version 330
-
-uniform float rotation;
-
-in vec2 pos;
-in vec2 start;
-
-out vec4 fragColor;
-
-void main(){
-    
-    vec2 z = start;
-    
-    int i = 0;
-    for (i = 0; i < 30; i++) {
-        vec2 zsq = z*z;
-        if(zsq.x + zsq.y > 16.0) break;
-        
-        float t = zsq.x - zsq.y + pos.x;
-        z.y = 2.0*z.x*z.y + pos.y;
-        z.x = t;
-    }
-    
-    fragColor = vec4(float(i) / 30.0);
-    fragColor.bg = 0.5 * sin(z) + 0.5;
-}

GLEssentials/Fractal.vsh

@@ -1,18 +0,0 @@
-#version 330
-
-uniform float rotation;
-
-in vec4 position;
-in vec4 color;
-
-out vec2 pos;
-out vec2 start;
-
-void main(){
-    pos = position.xy;
-    pos.x -= 0.5;
-    
-    start = sqrt(1.0 + 0.01 * rotation) * 0.3 * sin(vec2(0.1, 0.1337) * rotation);
-    
-    gl_Position = position;
-}

GLEssentials/Game.h

@@ -12,5 +12,7 @@
 @interface Game : NSObject
 - (void)update:(float)dt;
 - (void)draw;
+- (void)action:(NSString*)a;
 @property (nonatomic) CGSize windowSize;
+@property (nonatomic) NSArray * actions;
 @end

GLEssentials/Game.mm

@@ -7,111 +7,122 @@
 //
 
 #import "Game.h"
+#include "Drawer.h"
+#include "Car.h"
+#include "Path.h"
 #include <moggle/core/gl.hpp>
+#include <Box2D/Box2D.h>
+#include <string>
+#include <map>
+#include <functional>
 
-#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+using namespace moggle;
 
+static int ncars = 10;
 
-#ifdef TARGET_OS_IPHONE
+struct GameCPP{
-NSString * file = @"Fractal-iOS";
+    std::map<std::string, std::function<void()>> actions;
-#else
+    bool should_regenerate = false;
-NSString * file = @"Fractal";
+    int steps = 2;
-#endif
     
-const GLfloat quad[] = {
+    std::string bundle;
-    // x y z, r g b
+    Drawer drawer{bundle};
-    1, -1, 0, 1, 0, 0,
+    
-    -1, -1, 0, 0, 1, 0,
+    b2Vec2 gravity{0.0f, -10.0f};
-    1, 1, 0, 0, 0, 1,
+    b2World world{gravity};
-    -1, 1, 0, 1, 1, 1
+    
+    std::vector<Car> cars;
+    Path path{world};
+    
+    GameCPP(std::string const & bundle_)
+    : bundle(bundle_){
+        actions["regenerate"] = [this]{ should_regenerate = true; };
+        actions["speed"] = [this]{ steps *= 2; if(steps >= 32) steps = 2; };
+        
+        path.buildUpTo(100);
+        
+        create_cars();
+        
+        drawer.SetFlags(b2Draw::e_shapeBit + b2Draw::e_jointBit);
+        world.SetDebugDraw(&drawer);
+    }
+    
+    void create_cars(){
+        for(int i = 0; i < ncars; ++i){
+            cars.emplace_back(world);
+        }
+    }
+    
+    void draw(){
+        drawer.camera = convert(getFurthest());
+        drawer.clear();
+        world.DrawDebugData();
+        drawer.draw();
+    }
+    
+    void update(float dt){
+        if(should_regenerate){
+            should_regenerate = false;
+            cars.clear();
+            create_cars();
+        }
+        for(int i = 0; i < steps; ++i){
+            path.buildUpTo(getFurthest().x + 25);
+            world.Step(dt, 8, 3);
+        }
+    }
+    
+    void resize(float width, float height){
+        drawer.resize(width, height);
+    }
+    
+    b2Vec2 getFurthest() const {
+        b2Vec2 furthest = {0, 0};
+        for(auto&& c : cars){
+            auto p = c.getPosition();
+            if(p.x > furthest.x){
+                furthest = p;
+            }
+        }
+        return furthest;
+    }
 };
 
-static void check_shader(GLuint s){
+@implementation Game{
-    GLint logLength;
+    GameCPP * game;
-    glGetShaderiv(s, GL_INFO_LOG_LENGTH, &logLength);
+    NSMutableArray * actions;
-    if (logLength > 0) {
-        GLchar *log = (GLchar *)malloc(logLength);
-        glGetShaderInfoLog(s, logLength, &logLength, log);
-        NSLog(@"Shader compile log:\n%s", log);
-        free(log);
-    }
 }
 
-@implementation Game{
+@synthesize windowSize, actions;
-    float time;
-    GLuint program;
-    GLint uniform;
-    GLuint vao;
-    GLuint posBufferName;
-}
 
 - (id)init{
     if(self = [super init]){
-        time = 0;
+        NSString * path = [[NSBundle mainBundle] resourcePath];
-        program = glCreateProgram();
+        game = new GameCPP([path UTF8String]);
+        actions = [NSMutableArray arrayWithCapacity: 10];
         
-        NSError * error = nil;
+        for(auto&& p : game->actions){
-        
+            [actions addObject:[NSString stringWithUTF8String:p.first.c_str()]];
-        NSString * vs = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:file ofType:@"vsh"] encoding:NSASCIIStringEncoding error:&error];
+        }
-        NSString * fs = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:file ofType:@"fsh"] encoding:NSASCIIStringEncoding error:nil];
-        
-        GLchar const * vs_cstr = [vs UTF8String];
-        GLchar const * fs_cstr = [fs UTF8String];
-        
-        GLuint v = glCreateShader(GL_VERTEX_SHADER);
-        glShaderSource(v, 1, &vs_cstr, NULL);
-        glCompileShader(v);
-        check_shader(v);
-        
-        GLuint f = glCreateShader(GL_FRAGMENT_SHADER);
-        glShaderSource(f, 1, &fs_cstr, NULL);
-        glCompileShader(f);
-        check_shader(f);
-
-        glAttachShader(program, v);
-        glAttachShader(program, f);
-        
-        glBindAttribLocation(program, 0, "position");
-        glBindAttribLocation(program, 1, "color");
-        
-        glLinkProgram(program);
-        
-        uniform = glGetUniformLocation(program, "rotation");
-        
-        glDetachShader(program, v);
-        glDeleteShader(v);
-        glDetachShader(program, f);
-        glDeleteShader(f);
-        
-        glGenVertexArrays(1, &vao);
-        glBindVertexArray(vao);
-        
-		glGenBuffers(1, &posBufferName);
-		glBindBuffer(GL_ARRAY_BUFFER, posBufferName);
-        glBufferData(GL_ARRAY_BUFFER, 4*6*4, quad, GL_STATIC_DRAW);
-
-        glEnableVertexAttribArray(0);
-        glEnableVertexAttribArray(1);
-
-        glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(0));
-        glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(3*4));
     }
     return self;
 }
 
 - (void)update:(float)dt{
-    time += dt;
+    game->update(dt);
 }
 
 - (void)draw{
-    glClearColor(0.65f, 0.65f, 0.65f, 1.0f);
+    game->draw();
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
 
-    glUseProgram(program);
+- (void)action:(NSString *)a{
-    glUniform1f(uniform, time);
+    game->actions[[a UTF8String]]();
-    glBindVertexArray(vao);
+}
 
-    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+- (void)setWindowSize:(CGSize)windowSize_{
+    windowSize = windowSize_;
+    game->resize(windowSize.width, windowSize.height);
 }
 
 @end

GLEssentials/OSX/GLView.m

@@ -123,6 +123,25 @@ static CVReturn MyDisplayLinkCallback(CVDisplayLinkRef displayLink,
 	[[self openGLContext] setValues:&swapInt forParameter:NSOpenGLCPSwapInterval];
 	
 	game = [[Game alloc] init];
+    
+    CGFloat x = 20;
+    CGFloat y = 20;
+    for (NSString * a in game.actions) {
+        NSButton *myButton = [[NSButton alloc] initWithFrame:NSMakeRect(x, y, 200, 22)];
+        myButton.buttonType = NSMomentaryLightButton;
+        myButton.bezelStyle = NSRecessedBezelStyle;
+        myButton.title = a;
+        myButton.target = self;
+        myButton.action = @selector(action:);
+        myButton.wantsLayer = YES;
+        [self addSubview: myButton];
+        
+        y += 22;
+    }
+}
+
+- (void) action:(NSButton*) sender{
+    [game action:sender.title];
 }
 
 - (void) reshape{

GLEssentials/Path.cpp

@@ -0,0 +1,114 @@
+//
+//  Path.cpp
+//  OSXGLEssentials
+//
+//  Created by Joshua Moerman on 10/03/14.
+//
+//
+
+#include "Path.h"
+
+#include <cmath>
+#include <random>
+
+// A default thingy which makes implementing it easier. A subclass only have to
+// provide new points, which will be connected (So this is not suitable for
+// e.g. jumps or circles)
+struct DefaultBuilder : PathBuilder {
+    // number of vertices in one chunk
+    static constexpr auto chainLength = 8;
+    
+    DefaultBuilder(b2World & world_, b2Vec2 startingPoint)
+    : world(world_)
+    , previous(startingPoint)
+    , current(startingPoint)
+    {
+        fixture.friction = 2.0;
+    }
+    
+    void buildUpTo(float x) override {
+        b2BodyDef groundBodyDef;
+        groundBodyDef.position = {0.0f, -10.0f};
+        
+        while(current.x < x){
+            auto oldPreviousPoint = previous;
+            
+            b2Vec2 chainPositions[chainLength];
+            chainPositions[0] = current;
+            for(int i = 1; i < chainLength; ++i){
+                chainPositions[i] = next;
+                previous = current;
+                current = next;
+                // we always generate one more, for the b2 ghost vertices
+                generate_next();
+            }
+
+            b2ChainShape chain;
+            chain.CreateChain(chainPositions, chainLength);
+            chain.SetPrevVertex(oldPreviousPoint);
+            chain.SetNextVertex(next);
+            
+            fixture.shape = &chain;
+            auto groundBody = world.CreateBody(&groundBodyDef);
+            groundBody->CreateFixture(&fixture);
+        }
+    }
+    
+    virtual void generate_next() = 0;
+    
+protected:
+    std::mt19937 generator{0};
+    std::uniform_real_distribution<float> distribution{-1.0, 1.0};
+    
+    b2World & world;
+    
+    b2Vec2 previous;
+    b2Vec2 current;
+    b2Vec2 next;
+    
+    b2FixtureDef fixture;
+};
+
+// Creates random terrain, roughness comes with time
+struct RandomBuilder : DefaultBuilder {
+    RandomBuilder(b2World & world_, b2Vec2 startingPoint)
+    : DefaultBuilder(world_, startingPoint)
+    {
+        generate_next();
+    }
+
+    virtual void generate_next() override {
+        auto t = current.x;
+        
+        float m = std::sqrt(0.001f*t + 1) - 1;
+        if(t <= 0) m = 0;
+        float slope = m * distribution(generator);
+        
+        auto rot = b2Rot(slope);
+        next = b2Mul(rot, {10, 0}) + current;
+    }
+};
+
+// A flat road
+struct FlatBuilder : DefaultBuilder {
+    FlatBuilder(b2World & world_, b2Vec2 startingPoint)
+    : DefaultBuilder(world_, startingPoint)
+    {
+        generate_next();
+    }
+    
+    virtual void generate_next() override {
+        b2Vec2 newPiece = {10, 0};
+        next = newPiece + current;
+    }
+};
+
+Path::Path(b2World & world_)
+: world(world_)
+, impl(new RandomBuilder(world, {-20, 0}))
+{}
+
+void Path::buildUpTo(float x){
+    impl->buildUpTo(x);
+}
+

GLEssentials/Path.h

@@ -0,0 +1,27 @@
+//
+//  Path.h
+//  OSXGLEssentials
+//
+//  Created by Joshua Moerman on 10/03/14.
+//
+//
+
+#pragma once
+
+#include <Box2D/Box2D.h>
+#include <memory>
+
+struct PathBuilder {
+    virtual ~PathBuilder() = default;
+    virtual void buildUpTo(float x) = 0;
+};
+
+// Has a path builder object
+struct Path {
+    Path(b2World & world);
+    void buildUpTo(float x);
+
+private:
+    b2World & world;
+    std::unique_ptr<PathBuilder> impl;
+};

GLEssentials/iOS/ViewController.m

@@ -32,11 +32,12 @@
     view.context = self.context;
     view.drawableDepthFormat = GLKViewDrawableDepthFormat24;
     view.drawableMultisample = GLKViewDrawableMultisampleNone;
-    view.contentScaleFactor = 1.0;
+    //view.contentScaleFactor = 1.0;
     
     self.preferredFramesPerSecond = 60;
     
     [self setupGL];
+    game.windowSize = self.view.bounds.size;
 }
 
 - (void)dealloc{
@@ -64,6 +65,10 @@
     // Dispose of any resources that can be recreated.
 }
 
+-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
+    game.windowSize = self.view.bounds.size;
+}
+
 - (void)setupGL{
     [EAGLContext setCurrentContext:self.context];
     game = [[Game alloc] init];

GLEssentials/plain-iOS.fsh

@@ -0,0 +1,8 @@
+#version 100
+
+varying lowp vec4 interpolated_color;
+varying lowp vec4 interpolated_position;
+
+void main(){
+    gl_FragColor = interpolated_color;
+}

GLEssentials/plain-iOS.vsh

@@ -0,0 +1,16 @@
+#version 100
+
+uniform mat4 mvp;
+
+attribute vec4 position;
+attribute vec4 color;
+
+varying vec4 interpolated_color;
+varying vec4 interpolated_position;
+
+void main(){
+    interpolated_color = color;
+    interpolated_position = position;
+    
+    gl_Position = mvp * position;
+}

GLEssentials/plain.fsh

@@ -0,0 +1,10 @@
+#version 330
+
+in vec4 interpolated_color;
+in vec4 interpolated_position;
+
+out vec4 fragColor;
+
+void main(){
+    fragColor = interpolated_color;
+}

GLEssentials/plain.vsh

@@ -0,0 +1,16 @@
+#version 330
+
+uniform mat4 mvp;
+
+in vec4 position;
+in vec4 color;
+
+out vec4 interpolated_color;
+out vec4 interpolated_position;
+
+void main(){
+    interpolated_color = color;
+    interpolated_position = position;
+    
+    gl_Position = mvp * position;
+}

Podfile

@@ -7,13 +7,13 @@ target 'OSX' do
 	platform :osx, '10.9'
 
 	pod 'box2d'
-	pod 'moggle', :path => '../moggle'
+	pod 'moggle', :git => 'https://github.com/Jaxan/moggle', :tag => "0.1.0"
 end
 
 target 'iOS' do
 	platform :ios, '7.0'
 
 	pod 'box2d'
-	pod 'moggle', :path => '../moggle'
+	pod 'moggle', :git => 'https://github.com/Jaxan/moggle', :tag => "0.1.0"
 end