96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
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#include "SpriteRenderer.h"
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Core::SpriteRenderer::SpriteRenderer()
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{
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this->initRenderData();
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}
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Core::SpriteRenderer::~SpriteRenderer()
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{
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glDeleteVertexArrays(1, &this ->VAO);
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glDeleteBuffers(1, &this->VBO);
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glDeleteBuffers(1, &this->EBO);
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}
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void Core::SpriteRenderer::DrawSprite(GLuint spriteTexture, const glm::mat4 modelMatrix, GLuint program) {
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Spaceship* spaceship = Spaceship::getInstance();
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// Pobierz pozycj<63> kamery
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glm::vec3 cameraPosition = spaceship->cameraPos;
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// Tw<54>rz macierz lookAt mi<6D>dzy kwadratem a kamer<65>
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glm::mat4 billboardModelMatrix = glm::lookAt(glm::vec3(modelMatrix[3]), cameraPosition, glm::vec3(0.0f, 1.0f, 0.0f));
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// Reset the rotation part of the matrix to make it face the camera
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//billboardModelMatrix[0][0] = 1.0f;
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//billboardModelMatrix[0][1] = 0.0f;
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//billboardModelMatrix[0][2] = 0.0f;
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billboardModelMatrix[1][0] = 0.0f;
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billboardModelMatrix[1][1] = 1.0f;
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billboardModelMatrix[1][2] = 0.0f;
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billboardModelMatrix[2][0] = 0.0f;
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billboardModelMatrix[2][1] = 0.0f;
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billboardModelMatrix[2][2] = 1.0f;
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// Utw<74>rz macierz widoku-projekcji
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glm::mat4 viewProjectionMatrix = Core::createPerspectiveMatrix() * spaceship->createCameraMatrix();
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// Kombinuj macierze transformacji
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glm::mat4 transformation = viewProjectionMatrix * billboardModelMatrix * modelMatrix;
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// Przeka<6B> macierze do shadera
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glUniformMatrix4fv(glGetUniformLocation(program, "transformation"), 1, GL_FALSE, glm::value_ptr(transformation));
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glUniformMatrix4fv(glGetUniformLocation(program, "modelMatrix"), 1, GL_FALSE, glm::value_ptr(billboardModelMatrix));
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Core::SetActiveTexture(spriteTexture, "colorTexture", program, 0);
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glBindVertexArray(this->VAO);
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
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glBindVertexArray(0);
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}
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void Core::SpriteRenderer::initRenderData()
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{
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// Definicja wierzcho<68>k<EFBFBD>w kwadratu
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float vertices[] = {
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// Postions //colors // texture coordiantes
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-0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, // Left down
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-0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,1.0f, // Left up
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0.5f, 0.5f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,// Right up
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0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f,0.0f// Right down
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};
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// Definicja indeks<6B>w wierzcho<68>k<EFBFBD>w dla kwadratu
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unsigned int indices[] = {
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0, 2, 1, // Upper triangle
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0, 3, 2 // Lower triangle
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};
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glGenVertexArrays(1, &this->VAO);
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glGenBuffers(1, &this->VBO);
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glGenBuffers(1, &this->EBO);
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glBindVertexArray(this->VAO);
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// Wype<70>nij bufor wierzcho<68>k<EFBFBD>w
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glBindBuffer(GL_ARRAY_BUFFER, this->VBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
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// Wype<70>nij bufor indeks<6B>w
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->EBO);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(1);
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// Konfiguracja atrybutu koordynatow kolorow
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3 * sizeof(float)));
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glEnableVertexAttribArray(2);
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// Konfiguracja atrybutu koordynatow tekstury
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glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6 * sizeof(float)));
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glBindVertexArray(0);
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}
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