Adapted Escape the Dawn engine.

src/Skybox.cpp

@@ -0,0 +1,91 @@
+#include "PrecompiledHeader.h"
+#include "Skybox.h"
+
+Skybox::Skybox(std::string skyboxPath, std::string extension /* = "png" */)
+{
+	m_Cubemap = std::make_shared<CubemapTexture>(
+		skyboxPath + "/right." + extension,
+		skyboxPath + "/left." + extension,
+		skyboxPath + "/top." + extension,
+		skyboxPath + "/bottom." + extension,
+		skyboxPath + "/front." + extension,
+		skyboxPath + "/back." + extension);
+	m_Cubemap->Load();
+	Initialize();
+}
+
+void Skybox::Initialize()
+{
+	float cubeVertices[] = {
+		-1.0f, -1.0f, -1.0f,
+		1.0f, -1.0f, -1.0f,
+		1.0f, 1.0f, -1.0f,
+		-1.0f, 1.0f, -1.0f,
+
+		-1.0f, -1.0f, 1.0f,
+		1.0f, -1.0f, 1.0f,
+		1.0f, 1.0f, 1.0f,
+		-1.0f, 1.0f, 1.0f,
+	};
+	//std::copy(cubeVertices, cubeVertices + (3*8 - 1), m_CubeVertices);
+
+	unsigned int cubeIndices[] = {
+		// Back
+		0, 2, 3,
+		0, 1, 2,
+
+		// Right
+		1, 6, 2,
+		1, 5, 6,
+
+		// Front
+		5, 7, 6,
+		5, 4, 7,
+
+		// Left
+		4, 3, 7,
+		4, 0, 3,
+
+		// Top
+		3, 6, 7,
+		3, 2, 6,
+
+		// Bottom
+		4, 1, 0,
+		4, 5, 1,
+	};
+	//std::copy(cubeIndices, cubeIndices + (3*12 - 1), m_CubeIndices);
+
+	GLuint vbo;
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, 3 * 8 * sizeof(float), cubeVertices, GL_STATIC_DRAW);
+
+	glGenBuffers(1, &ibo);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, 3 * 12 * sizeof(int), cubeIndices, GL_STATIC_DRAW);
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
+	glEnableVertexAttribArray(0);
+
+	GLERROR("Skybox init");
+}
+
+
+Skybox::~Skybox()
+{
+
+}
+
+void Skybox::Draw()
+{
+	m_Cubemap->Bind(GL_TEXTURE0);
+
+	glBindVertexArray(vao);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+	glDepthMask(GL_FALSE);
+	glDrawElements(GL_TRIANGLES, 3 * 12, GL_UNSIGNED_INT, 0);
+	glDepthMask(GL_TRUE);
+}