Added gamma correction, Blinn-Phong shading, and normal map support

Game/src/MainState.cpp

@@ -4,17 +4,17 @@ void MainState::onEnter() {
 	Log("MainState onEnter!");
 	camera->setType(nf::Camera::Type::FIRST_PERSON);
 	ap.load("example.nfpack");
-	test.create(ap["spec.obj"]);
-	test.setPosition(0.0, 0.0, -5.0);
-	plane.create(nf::BaseAssets::plane);
-	plane.setPosition(0.0, -2.0, 0.0);
-	plane.setScale(10.0);
+	test.create(ap["normal.obj"]);
+	test.setPosition(0.0, 0.05, -5.0);
+	plane.create(nf::BaseAssets::cube);
+	plane.setPosition(0.0, -1.0, 0.0);
+	plane.setScale(50.0, 0.05, 50.0);
 	text.create("This is a test text.", nf::Vec2(0.1, 0.025), nf::Vec3(0.8));
 	text.centered(true);
 	uiTex.create(nf::BaseAssets::logo, nf::Vec2(0.025, 0.025), 0.5);
 	button.create(nf::Vec2(0.8, 0.025), "Reset");
 	button2.create(nf::Vec2(0.6, 0.025), "Play Sound");
-	light.create(nf::Vec3(-5.0, 10.0, 5.0), nf::Vec3(1.0, 1.0, 1.0), 1.0);
+	light.create(nf::Vec3(-5.0, 10.0, 5.0), nf::Vec3(1.0, 1.0, 1.0));
 	cm.create(nf::BaseAssets::cubemap);
 
 	sound.create(ap["sound.wav"]);
@@ -51,7 +51,7 @@ void MainState::update(double deltaTime) {
 		xrot += offset;
 	if (app->isKeyHeld(NFI_RIGHT))
 		xrot -= offset;
-	test.setPosition(-xrot / 10.0, 0.0, -yrot / 10.0 - 5.0);
+	light.setPosition(nf::Vec3(-5.0, yrot / 10.0 + 10.0, 5.0));
 
 	text.setText("FPS: " + std::to_string(app->getFPS()));
 

NFPackCreator/AssetBuild/base/shaders/entityFragment.shader

@@ -16,6 +16,8 @@ struct Material {
 	bool hasSpecTex;
 	sampler2D specularTexture;
 	float specPower;
+	bool hasNormTex;
+	sampler2D normalTexture;
 };
 
 struct Light {
@@ -96,6 +98,15 @@ void main() {
 	if (material.hasSpecTex)
 		matSpec = texture(material.specularTexture, texCoord).rgb;
 
+	vec3 norm;
+	if (material.hasNormTex) {
+		norm = texture(material.normalTexture, texCoord).rgb;
+		norm = normalize(norm * 2.0 - 1.0);
+	}
+	else {
+		norm = normalize(normals);
+	}
+
 	float ambientStrength = 0.2f;
 	vec3 ambient = ambientStrength * matDiff;
 	if (!isContinued)
@@ -104,7 +115,6 @@ void main() {
 
 		if (light[i].type == 1) {
 			vec3 lightDir = normalize(light[i].pos - fragPos);
-			vec3 norm = normalize(normals);
 			float diff = max(dot(norm, lightDir), 0.0);
 			vec3 diffuse = light[i].color * diff * matDiff * (light[i].strength / 2.0f);
 
@@ -119,13 +129,12 @@ void main() {
 		}
 		if (light[i].type == 2) {
 			vec3 lightDir = normalize(light[i].pos - fragPos);
-			vec3 norm = normalize(normals);
 			float diff = max(dot(norm, lightDir), 0.0);
 			vec3 diffuse = light[i].color * diff * matDiff * light[i].strength;
 
 			vec3 viewDir = normalize(camera.pos - fragPos);
-			vec3 reflectDir = reflect(-lightDir, norm);
-			float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.specPower);
+			vec3 halfway = normalize(lightDir + viewDir);
+			float spec = pow(max(dot(norm, halfway), 0.0), material.specPower);
 			vec3 specular = light[i].color * spec * matSpec * (light[i].strength / 2.5f);
 
 			float length = length(light[i].pos - fragPos);
@@ -136,5 +145,8 @@ void main() {
 			continue;
 		}
 	}
+	//TODO: Move this to a post-processing pass
+	float gamma = 2.2;
+	color.rgb = pow(color.rgb, vec3(1.0 / gamma));
 	outColor = vec4(color, 1.0);
 }

NFPackCreator/AssetBuild/base/shaders/uiTextureFragment.shader

@@ -5,10 +5,13 @@ in vec2 texCoord;
 uniform sampler2D tex;
 uniform float opacity;
 
-out vec4 color;
+out vec4 outColor;
 
 void main() {
 	vec4 texColor = texture(tex, texCoord);
-
-	color = vec4(texColor.rgb, texColor.a * opacity);
-}
+	vec4 color = texColor;
+	//TODO: Move this to a post-processing pass too
+	float gamma = 2.2;
+	color.rgb = pow(color.rgb, vec3(1.0 / gamma));
+	outColor = vec4(color.rgb, texColor.a * opacity);
+}

NFPackCreator/AssetBuild/example/models/normal.mtl

@@ -0,0 +1,14 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl mat
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Bump brickwall_normal.jpg
+map_Kd brickwall.jpg

NFPackCreator/AssetBuild/example/models/normal.obj

@@ -0,0 +1,17 @@
+# Blender v2.93.3 OBJ File: ''
+# www.blender.org
+mtllib normal.mtl
+o Plane_Plane.001
+v -1.000000 -1.000000 -0.000000
+v 1.000000 -1.000000 -0.000000
+v -1.000000 1.000000 0.000000
+v 1.000000 1.000000 0.000000
+vt 1.000000 0.000000
+vt 0.000000 1.000000
+vt 0.000000 0.000000
+vt 1.000000 1.000000
+vn 0.0000 -0.0000 1.0000
+usemtl mat
+s off
+f 2/1/1 3/2/1 1/3/1
+f 2/1/1 4/4/1 3/2/1

NFPackCreator/src/main.cpp

@@ -69,7 +69,10 @@ void getNeededImages(std::string mtl, std::set<std::string>& set) {
 		unsigned int pos = mtl.find("map_");
 		if (pos == std::string::npos)
 			break;
-		mtl = mtl.substr(pos + 7);
+		if (pos == mtl.find("map_Kd") || pos == mtl.find("map_Ks"))
+			mtl = mtl.substr(pos + 7);
+		else
+			mtl = mtl.substr(pos + 9);
 		std::stringstream ss(mtl);
 		std::string temp;
 		ss >> temp;
@@ -140,7 +143,7 @@ int main(int argc, char* argv[]) {
 				getNeededImages(mtlContents, neededImages);
 				if (!neededImages.empty()) {
 					currFileContents.insert(0, "\n");
-					for(std::string curr : neededImages) {
+					for (std::string curr : neededImages) {
 						currFileContents.insert(0, curr);
 						currFileContents.insert(0, " ");
 					}

NothinFancy/src/Renderer/Model.cpp

@@ -10,7 +10,7 @@
 #include "Utility.h"
 
 namespace nf {
-	Material::Material(const void* vb, const size_t vbSize, const void* tc, const size_t tcSize, const void* vn, const size_t vnSize, const void* ib, const unsigned int ibCount, ATexture* diffTex, Vec3& diffColor, ATexture* specTex, float shininess) {
+	Material::Material(const void* vb, const size_t vbSize, const void* tc, const size_t tcSize, const void* vn, const size_t vnSize, const void* ib, const unsigned int ibCount, ATexture* diffTex, Vec3& diffColor, ATexture* specTex, float shininess, ATexture* normalTex) {
 		m_vao = new VertexArray();
 		m_vao->addBuffer(vb, vbSize);
 		m_vao->push<float>(3);
@@ -35,9 +35,16 @@ namespace nf {
 			if (specTex->alreadyLoaded)
 				m_specularTexture = specTex->loadedTexture;
 			else
-				m_specularTexture = new Texture(specTex);
+				m_specularTexture = new Texture(specTex, true);
 		}
 		m_shininess = shininess;
+		if (normalTex) {
+			m_hasNormal = true;
+			if (normalTex->alreadyLoaded)
+				m_normalTexture = normalTex->loadedTexture;
+			else
+				m_normalTexture = new Texture(normalTex, true);
+		}
 	}
 
 	void Material::render(Shader* shader, bool onlyDepth) {
@@ -60,6 +67,13 @@ namespace nf {
 			}
 			else
 				shader->setUniform("material.hasSpecTex", false);
+			if (m_hasNormal) {
+				shader->setUniform("material.hasNormTex", true);
+				m_normalTexture->bind(2);
+				shader->setUniform("material.normalTexture", 2);
+			}
+			else
+				shader->setUniform("material.hasNormTex", false);
 			shader->setUniform("material.specPower", m_shininess);
 		}
 		glDrawElements(GL_TRIANGLES, m_ib->getCount(), GL_UNSIGNED_INT, nullptr);
@@ -94,6 +108,7 @@ namespace nf {
 			std::string diffuseTextureName;
 			Vec3 diffuseColor;
 			std::string specularTextureName;
+			std::string normalTextureName;
 			float shininess = 1.0f;
 		};
 		std::unordered_map<std::string, TempMaterial*> mats;
@@ -124,6 +139,11 @@ namespace nf {
 				sscanf_s(mtl.c_str(), "\nmap_Ks %s\n", texName, (unsigned)_countof(texName));
 				mats[currMat]->specularTextureName = (std::string)texName;
 			}
+			else if (std::strcmp(line, "map_Bump") == 0) {
+				char texName[100];
+				sscanf_s(mtl.c_str(), "\nmap_Bump %s\n", texName, (unsigned)_countof(texName));
+				mats[currMat]->normalTextureName = (std::string)texName;
+			}
 			else if (std::strcmp(line, "Ns") == 0) {
 				float s = 0.0;
 				sscanf_s(mtl.c_str(), "\nNs %f\n", &s);
@@ -277,7 +297,10 @@ namespace nf {
 			ATexture* spec = nullptr;
 			if (curr.specularTextureName.size())
 				spec = model->neededTextures[curr.specularTextureName];
-			m_materials.push_back(new Material(&curr.outVB[0], curr.outVB.size() * sizeof(float), &curr.outTC[0], curr.outTC.size() * sizeof(float), &curr.outVN[0], curr.outVN.size() * sizeof(float), &curr.outIB[0], curr.ibCount, diff, curr.diffuseColor, spec, curr.shininess));
+			ATexture* norm = nullptr;
+			if (curr.normalTextureName.size())
+				norm = model->neededTextures[curr.normalTextureName];
+			m_materials.push_back(new Material(&curr.outVB[0], curr.outVB.size() * sizeof(float), &curr.outTC[0], curr.outTC.size() * sizeof(float), &curr.outVN[0], curr.outVN.size() * sizeof(float), &curr.outIB[0], curr.ibCount, diff, curr.diffuseColor, spec, curr.shininess, norm));
 
 			delete m.second;
 		}

NothinFancy/src/Renderer/Renderer.cpp

@@ -387,7 +387,7 @@ namespace nf {
 	}
 
 	void Renderer::createShadowMap() {
-		m_texSlots = 16;
+		m_texSlots = 13;
 		glGenFramebuffers(1, &m_shadowMapFBO);
 		glBindFramebuffer(GL_FRAMEBUFFER, m_shadowMapFBO);
 		for (unsigned int i = 0; i < m_texSlots; i++) {

NothinFancy/src/Renderer/Texture.cpp

@@ -8,7 +8,7 @@
 #include "Utility.h"
 
 namespace nf {
-	Texture::Texture(ATexture* tex) :
+	Texture::Texture(ATexture* tex, bool linear) :
 		m_isBase(false),
 		m_id(0),
 		m_x(0),
@@ -23,10 +23,12 @@ namespace nf {
 		glBindTexture(GL_TEXTURE_2D, m_id);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_x, m_y, 0, nChannels == 3 ? GL_RGB : GL_RGBA, GL_UNSIGNED_BYTE, texture);
+		glTexImage2D(GL_TEXTURE_2D, 0, linear ? GL_RGBA : GL_SRGB_ALPHA, m_x, m_y, 0, nChannels == 3 ? GL_RGB : GL_RGBA, GL_UNSIGNED_BYTE, texture);
 		glGenerateMipmap(GL_TEXTURE_2D);
 		stbi_image_free(texture);
 		m_isBase = tex->isBaseAsset;
+		tex->alreadyLoaded = true;
+		tex->loadedTexture = this;
 	}
 
 	void Texture::bind(unsigned int slot) {

NothinFancy/src/include/Model.h

@@ -10,7 +10,7 @@ namespace nf {
 
 	class Material : public Drawable {
 	public:
-		Material(const void* vb, const size_t vbSize, const void* tc, const size_t tcSize, const void* vn, const size_t vnSize, const void* ib, const unsigned int ibCount, ATexture* diffTex, Vec3& diffColor, ATexture* specTex, float shininess);
+		Material(const void* vb, const size_t vbSize, const void* tc, const size_t tcSize, const void* vn, const size_t vnSize, const void* ib, const unsigned int ibCount, ATexture* diffTex, Vec3& diffColor, ATexture* specTex, float shininess, ATexture* normalTex);
 
 		void render(Shader* shader, bool onlyDepth);
 
@@ -22,6 +22,8 @@ namespace nf {
 		bool m_hasSpecular = false;
 		Texture* m_specularTexture = nullptr;
 		float m_shininess;
+		bool m_hasNormal = false;
+		Texture* m_normalTexture = nullptr;
 	};
 
 	class Model {

NothinFancy/src/include/Texture.h

@@ -6,7 +6,7 @@ namespace nf {
 
 	class Texture {
 	public:
-		Texture(ATexture* tex);
+		Texture(ATexture* tex, bool linear = false);
 
 		void bind(unsigned int slot = 0);
 		Vec2 getDimensions();