Added Skyboxes
Former-commit-id: f4153c047d658afb3e42302a34b0263fbac78d88
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Lynix
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// Copyright (C) 2013 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Graphics module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_SKYBOXBACKGROUND_HPP
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#define NAZARA_SKYBOXBACKGROUND_HPP
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#include <Nazara/Prerequesites.hpp>
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#include <Nazara/Graphics/Background.hpp>
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#include <Nazara/Renderer/Texture.hpp>
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#include <Nazara/Renderer/TextureSampler.hpp>
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class NzIndexBuffer;
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class NzShader;
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class NzVertexBuffer;
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class NAZARA_API NzSkyboxBackground : public NzBackground
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{
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public:
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NzSkyboxBackground();
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NzSkyboxBackground(NzTexture* cubemapTexture);
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~NzSkyboxBackground();
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void Draw(const NzScene* scene) const;
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nzBackgroundType GetBackgroundType() const;
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NzTexture* GetTexture() const;
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const NzTextureSampler& GetTextureSampler();
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void SetTexture(NzTexture* cubemapTexture);
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void SetTextureSampler(const NzTextureSampler& sampler);
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private:
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NzTextureRef m_texture;
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NzTextureSampler m_sampler;
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NzIndexBuffer* m_indexBuffer;
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NzShader* m_shader;
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NzVertexBuffer* m_vertexBuffer;
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};
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#endif // NAZARA_SKYBOXBACKGROUND_HPP
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// Copyright (C) 2013 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Graphics module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#define NAZARA_RENDERER_OPENGL // Nécessaire pour accéder à OpenGL
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#include <Nazara/Renderer/OpenGL.hpp>
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#include <Nazara/Graphics/SkyboxBackground.hpp>
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#include <Nazara/Graphics/Camera.hpp>
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#include <Nazara/Graphics/Scene.hpp>
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#include <Nazara/Renderer/Renderer.hpp>
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#include <Nazara/Renderer/Shader.hpp>
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#include <Nazara/Utility/IndexBuffer.hpp>
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#include <Nazara/Utility/VertexBuffer.hpp>
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#include <Nazara/Utility/VertexDeclaration.hpp>
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#include <memory>
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#include <Nazara/Graphics/Debug.hpp>
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namespace
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{
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NzIndexBuffer* BuildIndexBuffer()
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{
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std::unique_ptr<NzIndexBuffer> indexBuffer(new NzIndexBuffer(36, false, nzBufferStorage_Hardware, nzBufferUsage_Static));
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indexBuffer->SetPersistent(false);
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nzUInt16 indices[6*6] =
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{
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0, 1, 2, 0, 2, 3,
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3, 2, 6, 3, 6, 7,
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7, 6, 5, 7, 5, 4,
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4, 5, 1, 4, 1, 0,
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0, 3, 7, 0, 7, 4,
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1, 6, 2, 1, 5, 6
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};
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if (!indexBuffer->Fill(indices, 0, 36))
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{
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NazaraError("Failed to create vertex buffer");
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return nullptr;
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}
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return indexBuffer.release();
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}
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NzShader* BuildShader()
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{
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const char* fragmentSource110 =
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"#version 110\n"
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"varying vec3 vTexCoord;\n"
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"uniform samplerCube Skybox;\n"
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"void main()\n"
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"{\n"
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" gl_FragColor = textureCube(Skybox, vTexCoord);\n"
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"}\n";
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const char* fragmentSource140 =
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"#version 140\n"
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"in vec3 vTexCoord;\n"
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"out vec4 RenderTarget0;\n"
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"uniform samplerCube Skybox;\n"
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"void main()\n"
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"{\n"
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" RenderTarget0 = texture(Skybox, vTexCoord);\n"
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"}\n";
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const char* vertexSource110 =
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"#version 110\n"
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"attribute vec3 VertexPosition;\n"
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"varying vec3 vTexCoord;\n"
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"uniform mat4 WorldViewProjMatrix;\n"
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"void main()\n"
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"{\n"
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" gl_Position = WorldViewProjMatrix * vec4(VertexPosition, 1.0);\n"
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" vTexCoord = vec3(VertexPosition.x, -VertexPosition.y, -VertexPosition.z);\n"
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"}\n";
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const char* vertexSource140 =
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"#version 140\n"
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"in vec3 VertexPosition;\n"
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"out vec3 vTexCoord;\n"
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"uniform mat4 WorldViewProjMatrix;\n"
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"void main()\n"
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"{\n"
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" gl_Position = WorldViewProjMatrix * vec4(VertexPosition, 1.0);\n"
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" vTexCoord = vec3(VertexPosition.x, -VertexPosition.y, -VertexPosition.z);\n"
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"}\n";
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///TODO: Remplacer ça par des ShaderNode
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std::unique_ptr<NzShader> shader(new NzShader(nzShaderLanguage_GLSL));
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shader->SetPersistent(false);
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bool useGLSL140 = (NzOpenGL::GetVersion() >= 310);
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if (!shader->Load(nzShaderType_Fragment, (useGLSL140) ? fragmentSource140 : fragmentSource110))
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{
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NazaraError("Failed to load fragment shader");
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return nullptr;
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}
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if (!shader->Load(nzShaderType_Vertex, (useGLSL140) ? vertexSource140 : vertexSource110))
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{
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NazaraError("Failed to load vertex shader");
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return nullptr;
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}
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if (!shader->Compile())
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{
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NazaraError("Failed to compile shader");
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return nullptr;
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}
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return shader.release();
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}
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NzVertexBuffer* BuildVertexBuffer()
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{
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std::unique_ptr<NzVertexDeclaration> declaration(new NzVertexDeclaration);
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declaration->SetPersistent(false);
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NzVertexElement elements;
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elements.offset = 0;
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elements.type = nzElementType_Float3;
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elements.usage = nzElementUsage_Position;
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if (!declaration->Create(&elements, 1))
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{
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NazaraError("Failed to create declaration");
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return nullptr;
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}
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std::unique_ptr<NzVertexBuffer> vertexBuffer(new NzVertexBuffer(declaration.get(), 8, nzBufferStorage_Hardware, nzBufferUsage_Static));
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declaration.release();
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vertexBuffer->SetPersistent(false);
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float vertices[8*(sizeof(float)*3)] =
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{
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-1.0, 1.0, 1.0,
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-1.0, -1.0, 1.0,
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1.0, -1.0, 1.0,
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1.0, 1.0, 1.0,
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-1.0, 1.0, -1.0,
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-1.0, -1.0, -1.0,
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1.0, -1.0, -1.0,
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1.0, 1.0, -1.0,
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};
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if (!vertexBuffer->Fill(vertices, 0, 8))
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{
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NazaraError("Failed to create vertex buffer");
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return nullptr;
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}
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return vertexBuffer.release();
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}
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static NzIndexBuffer* s_indexBuffer = nullptr;
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static NzShader* s_shader = nullptr;
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static NzVertexBuffer* s_vertexBuffer = nullptr;
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}
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NzSkyboxBackground::NzSkyboxBackground()
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{
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if (!s_indexBuffer)
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s_indexBuffer = BuildIndexBuffer();
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if (!s_shader)
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s_shader = BuildShader();
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if (!s_vertexBuffer)
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s_vertexBuffer = BuildVertexBuffer();
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m_indexBuffer = s_indexBuffer;
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m_indexBuffer->AddResourceReference();
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m_shader = s_shader;
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m_shader->AddResourceReference();
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m_sampler.SetWrapMode(nzSamplerWrap_Clamp); // Nécessaire pour ne pas voir les côtés
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m_vertexBuffer = s_vertexBuffer;
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m_vertexBuffer->AddResourceReference();
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}
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NzSkyboxBackground::NzSkyboxBackground(NzTexture* cubemapTexture) :
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NzSkyboxBackground()
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{
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SetTexture(cubemapTexture);
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}
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NzSkyboxBackground::~NzSkyboxBackground()
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{
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if (m_indexBuffer->RemoveResourceReference())
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s_indexBuffer = nullptr;
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if (m_shader->RemoveResourceReference())
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s_shader = nullptr;
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if (m_vertexBuffer->RemoveResourceReference())
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s_vertexBuffer = nullptr;
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}
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void NzSkyboxBackground::Draw(const NzScene* scene) const
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{
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nzUInt8 textureUnit;
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m_shader->SendTexture(m_shader->GetUniformLocation("Skybox"), m_texture, &textureUnit);
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const NzCamera* camera = scene->GetActiveCamera();
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const NzMatrix4f& viewMatrix = camera->GetViewMatrix();
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NzMatrix4f skyboxMatrix(viewMatrix);
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skyboxMatrix.SetTranslation(NzVector3f::Zero());
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NzRenderer::Enable(nzRendererParameter_DepthTest, false);
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NzRenderer::Enable(nzRendererParameter_FaceCulling, true);
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NzRenderer::SetFaceCulling(nzFaceCulling_Front);
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NzRenderer::SetIndexBuffer(m_indexBuffer);
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NzRenderer::SetMatrix(nzMatrixType_View, skyboxMatrix);
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NzRenderer::SetMatrix(nzMatrixType_World, NzMatrix4f::Scale(NzVector3f(camera->GetZNear())));
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NzRenderer::SetShader(m_shader);
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NzRenderer::SetTextureSampler(textureUnit, m_sampler);
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NzRenderer::SetVertexBuffer(m_vertexBuffer);
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NzRenderer::DrawIndexedPrimitives(nzPrimitiveType_TriangleList, 0, 36);
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NzRenderer::SetMatrix(nzMatrixType_View, viewMatrix);
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}
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nzBackgroundType NzSkyboxBackground::GetBackgroundType() const
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{
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return nzBackgroundType_Skybox;
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}
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NzTexture* NzSkyboxBackground::GetTexture() const
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{
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return m_texture;
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}
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void NzSkyboxBackground::SetTexture(NzTexture* cubemapTexture)
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{
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#if NAZARA_GRAPHICS_SAFE
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if (cubemapTexture && !cubemapTexture->IsCubemap())
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{
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NazaraError("Texture must be a cubemap");
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return;
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}
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#endif
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m_texture = cubemapTexture;
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}
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