Added fading between states

NFPackCreator/AssetBuild/base/shaders/fadeFragment.shader

@@ -0,0 +1,10 @@
+#version 330 core
+
+uniform float opacity;
+
+out vec4 color;
+
+void main() {
+
+	color = vec4(0.0, 0.0, 0.0, opacity);
+}

NFPackCreator/AssetBuild/base/shaders/fadeVertex.shader

@@ -0,0 +1,8 @@
+#version 330 core
+
+layout(location = 0) in vec2 pos;
+
+void main() {
+
+	gl_Position = vec4(pos.xy, 0.0, 1.0);
+}

NFPackCreator/AssetBuild/base/shaders/uiTextureFragment.shader

@@ -8,7 +8,7 @@ uniform float opacity;
 out vec4 color;
 
 void main() {
-	vec3 texColor = texture(tex, texCoord).rgb;
+	vec4 texColor = texture(tex, texCoord);
 
-	color = vec4(texColor.rgb, opacity);
+	color = vec4(texColor.rgb, texColor.a * opacity);
 }

NothinFancy/src/Application.cpp

@@ -251,6 +251,7 @@ namespace nf {
 	void Application::runMainGameThread() {
 		m_renderer = new Renderer(this);
 		startIntroState();
+		m_renderer->setFade(true, false, true);
 		std::chrono::steady_clock::time_point currentTime = std::chrono::steady_clock::now();
 		std::chrono::steady_clock::time_point lastFrame = std::chrono::steady_clock::now();
 		while (m_running) {
@@ -280,16 +281,25 @@ namespace nf {
 
 	void Application::startIntroState() {
 		m_sIntro = new IntroGamestate(this);
-		m_sIntro->onEnter();
 		m_currentState = m_sIntro;
+		m_currentState->onEnter();
 	}
 
 	void Application::doStateChange() {
-		m_stateChange = false;
-		//TODO: Do fade in and out here
-		m_currentState->onExit();
-		m_currentState = m_states[m_nextState];
-		m_currentState->onEnter();
+		static bool once = true;
+		if (once) {
+			m_renderer->setFade(false, true, false);
+			once = false;
+		}
+
+		if (m_renderer->isFadeOutComplete()) {
+			m_currentState->onExit();
+			m_currentState = m_states[m_nextState];
+			m_currentState->onEnter();
+			m_renderer->setFade(true, false, false);
+			m_stateChange = false;
+			once = true;
+		}
 	}
 
 	LRESULT CALLBACK Application::WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {

NothinFancy/src/Assets.cpp

@@ -162,10 +162,13 @@ namespace nf {
 		return m_assets[in];
 	}
 
-	AssetPack::~AssetPack() {
-		for (auto curr : m_assets) {
+	void AssetPack::unload() {
+		for (auto curr : m_assets)
 			delete curr.second;
-		}
+	}
+
+	AssetPack::~AssetPack() {
+		unload();
 	}
 
 	AModel* BaseAssets::cube;

NothinFancy/src/IntroGamestate.cpp

@@ -24,18 +24,15 @@ namespace nf {
 			app->changeState(app->getDefaultState());
 		}
 
-		static double opacity = 0.0;
-		static double scale = 1.0;
-		logoTex.setOpacity(opacity);
+		static double scale = 2.0;
 		logoTex.setScale(scale);
-		text.setOpacity(opacity);
 		if (m_counter >= 20) {
-			opacity += 0.02;
 			scale += 0.002;
 		}
-
 		m_counter++;
 
+		if (app->isInput(NFI_SPACE))
+			m_counter = 240;
 		if (app->isInput(NFI_ESCAPE))
 			app->quit();
 	}

NothinFancy/src/Renderer/Renderer.cpp

@@ -15,7 +15,11 @@
 
 namespace nf {
 	Renderer::Renderer(Application* app) :
-		m_cubemap(nullptr)
+		m_cubemap(nullptr),
+		m_fadeIn(false),
+		m_fadeOut(false),
+		m_fadeNoText(false),
+		m_fadeOutComplete(false)
 	{
 		m_app = app;
 		m_hdc = GetDC(m_app->getWindow());
@@ -75,6 +79,9 @@ namespace nf {
 		const char* cubemapVertex = m_baseAP["cubemapVertex.shader"]->data;
 		const char* cubemapFragment = m_baseAP["cubemapFragment.shader"]->data;
 		m_cubemapShader = new Shader(cubemapVertex, cubemapFragment);
+		const char* fadeVertex = m_baseAP["fadeVertex.shader"]->data;
+		const char* fadeFragment = m_baseAP["fadeFragment.shader"]->data;
+		m_fadeShader = new Shader(fadeVertex, fadeFragment);
 
 		BaseAssets::cube = (AModel*)m_baseAP["cube.obj"];
 		BaseAssets::plane = (AModel*)m_baseAP["plane.obj"];
@@ -84,6 +91,33 @@ namespace nf {
 		BaseAssets::torus = (AModel*)m_baseAP["torus.obj"];
 		BaseAssets::logo = (ATexture*)m_baseAP["logo.png"];
 		BaseAssets::defaultFont = (AFont*)m_baseAP["default.ttf"];
+
+		float fadeVB[] = {
+			-1.0, -1.0,
+			1.0, -1.0,
+			1.0, 1.0,
+			-1.0, 1.0
+		};
+		unsigned int fadeIB[] = {
+			0, 1, 2,
+			2, 3, 0
+		};
+		m_fadeVAO = new VertexArray;
+		m_fadeVAO->addBuffer(fadeVB, sizeof(fadeVB));
+		m_fadeVAO->push<float>(2);
+		m_fadeVAO->finishBufferLayout();
+		m_fadeIB = new IndexBuffer(fadeIB, 6);
+		m_loadingText.create("Loading...", Vec2(0.025, 0.044), Vec3(0.7, 0.7, 0.7));
+	}
+
+	void Renderer::setFade(bool in, bool out, bool noText) {
+		m_fadeIn = in;
+		m_fadeOut = out;
+		m_fadeNoText = noText;
+	}
+
+	bool Renderer::isFadeOutComplete() {
+		return m_fadeOutComplete;
 	}
 
 	void Renderer::render(Entity& in) {
@@ -156,6 +190,43 @@ namespace nf {
 			}
 		}
 		m_lUI.clear();
+
+		if (m_fadeIn) {
+			static double opacity = 1.0;
+			m_fadeShader->setUniform("opacity", (float)opacity);
+			m_fadeVAO->bind();
+			m_fadeIB->bind();
+			glDrawElements(GL_TRIANGLES, m_fadeIB->getCount(), GL_UNSIGNED_INT, nullptr);
+			if (!m_fadeNoText) {
+				m_textShader->setUniform("proj", proj);
+				m_loadingText.setOpacity(opacity);
+				m_loadingText.render(m_textShader, m_app->getConfig().width, m_app->getConfig().height);
+			}
+			opacity -= 0.03;
+			if (opacity <= 0.0) {
+				m_fadeIn = false;
+				m_fadeOutComplete = false;
+				opacity = 1.0;
+			}
+		}
+		else if (m_fadeOut) {
+			static double opacity = 0.0;
+			m_fadeShader->setUniform("opacity", (float)opacity);
+			m_fadeVAO->bind();
+			m_fadeIB->bind();
+			glDrawElements(GL_TRIANGLES, m_fadeIB->getCount(), GL_UNSIGNED_INT, nullptr);
+			if (!m_fadeNoText) {
+				m_textShader->setUniform("proj", proj);
+				m_loadingText.setOpacity(opacity);
+				m_loadingText.render(m_textShader, m_app->getConfig().width, m_app->getConfig().height);
+			}
+			opacity += 0.03;
+			if (opacity >= 1.0) {
+				m_fadeIn = false;
+				m_fadeOutComplete = true;
+				opacity = 0.0;
+			}
+		}
 		glEnable(GL_DEPTH_TEST);
 
 		SwapBuffers(m_hdc);
@@ -169,6 +240,10 @@ namespace nf {
 		delete m_entityShader;
 		delete m_textShader;
 		delete m_uiTextureShader;
+		delete m_cubemapShader;
+		delete m_fadeShader;
+		delete m_fadeVAO;
+		delete m_fadeIB;
 		ReleaseDC(m_app->getWindow(), m_hdc);
 		wglMakeCurrent(NULL, NULL);
 		wglDeleteContext(m_hglrc);

NothinFancy/src/include/NothinFancy.h

@@ -52,6 +52,9 @@ namespace nf {
 	public:
 		Renderer(Application* app);
 
+		void setFade(bool in, bool out, bool noText);
+		bool isFadeOutComplete();
+
 		void render(Entity& in);
 		void render(UIElement& in);
 		void render(Light& in);
@@ -76,6 +79,14 @@ namespace nf {
 		Shader* m_textShader;
 		Shader* m_uiTextureShader;
 		Shader* m_cubemapShader;
+		Shader* m_fadeShader;
+
+		bool m_fadeIn, m_fadeOut;
+		bool m_fadeNoText;
+		bool m_fadeOutComplete;
+		Text m_loadingText;
+		VertexArray* m_fadeVAO;
+		IndexBuffer* m_fadeIB;
 	};
 
 	class Application {

NothinFancy/src/include/Renderer.h

@@ -3,6 +3,7 @@
 #include <Windows.h>
 
 #include "Assets.h"
+#include "Text.h"
 
 namespace nf {
 	class Application;
@@ -12,11 +13,16 @@ namespace nf {
 	class Light;
 	class Cubemap;
 	class Camera;
+	class VertexArray;
+	class IndexBuffer;
 
 	class Renderer {
 	public:
 		Renderer(Application* app);
 
+		void setFade(bool in, bool out, bool noText);
+		bool isFadeOutComplete();
+
 		void render(Entity& in);
 		void render(UIElement& in);
 		void render(Light& in);
@@ -41,5 +47,13 @@ namespace nf {
 		Shader* m_textShader;
 		Shader* m_uiTextureShader;
 		Shader* m_cubemapShader;
+		Shader* m_fadeShader;
+
+		bool m_fadeIn, m_fadeOut;
+		bool m_fadeNoText;
+		bool m_fadeOutComplete;
+		Text m_loadingText;
+		VertexArray* m_fadeVAO;
+		IndexBuffer* m_fadeIB;
 	};
 }