118 lines
4.2 KiB
C++
118 lines
4.2 KiB
C++
#include "phongentity.h"
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#include "shader.h"
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//#include <glm/glm.hpp>
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#include "material.h"
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#include "mesh.h"
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//#include <glm/ext.hpp>
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#include "glassert.h"
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#define BUFFER_OFFSET(i) ((char *)NULL + (i))
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PhongEntity::PhongEntity(Mesh* myMesh) : mesh(myMesh) {}
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void PhongEntity::draw(const glm::mat4 viewMatrix, const glm::mat4 projectionMatrix)
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{
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glm::mat4 modelViewMatrix = viewMatrix * modelMatrix;
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glm::mat4 mvp = projectionMatrix * modelViewMatrix;
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glm::mat4 normalMatrix = glm::transpose(glm::inverse(modelViewMatrix));
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mat->bindAttributes();
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Shader* shader = mat->getShader();
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shader->bindMatrix(shader->getLocation("viewMatrix"), viewMatrix);
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shader->bindMatrix(shader->getLocation("modelViewMatrix"), modelViewMatrix);
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shader->bindMatrix(shader->getLocation("normalMatrix"), normalMatrix);
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shader->bindMatrix(shader->getLocation("MVP"), mvp);
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mesh->draw();
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}
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void PhongEntity::initGL(bool isDynamic)
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{
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GLenum buffer_type = isDynamic ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW;
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// create VAO
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glAssert(glGenVertexArrays(1, &vao));
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glAssert(glBindVertexArray(vao));
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nb_buffers = 1; // positions buffer
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if(hasNormals())
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++nb_buffers;
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if(hasTexCoords())
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++nb_buffers;
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if(hasTangents())
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++nb_buffers;
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nb_buffers += mesh->indiceGroups.size();
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// create VBOs
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glAssert(glGenBuffers(nb_buffers, vbo));
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for(const Mesh::Group &g : mesh->indiceGroups)
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{
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// init indices vbos
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[INDICES_BUFFER]));
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glAssert(glBufferData(GL_ARRAY_BUFFER, g.indices.size() * sizeof(GLuint), g.indices.data(), buffer_type));
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}
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// init positions vbo
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[POSITION_BUFFER]));
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glAssert(glBufferData(GL_ARRAY_BUFFER, mesh->positions.size() * sizeof(glm::vec3), mesh->positions.data(), buffer_type));
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if(hasNormals())
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{
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// init normals vbo
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[NORMAL_BUFFER]));
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glAssert(glBufferData(GL_ARRAY_BUFFER, mesh->normals.size() * sizeof(glm::vec3), mesh->normals.data(), buffer_type));
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}
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if(hasNormals())
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{
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// init texCoords vbo
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[TEXCOORD_BUFFER]));
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glAssert(glBufferData(GL_ARRAY_BUFFER, mesh->texCoords.size() * sizeof(glm::vec2), mesh->texCoords.data(), buffer_type));
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}
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if(hasTangents())
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{
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// init tangents vbo
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[TANGENT_BUFFER]));
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glAssert(glBufferData(GL_ARRAY_BUFFER, mesh->tangents.size() * sizeof(glm::vec3)*2, mesh->tangents.data(), buffer_type));
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}
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// unbind vao
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glAssert(glBindVertexArray(0));
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}
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void PhongEntity::destroyGL()
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{
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glAssert(glDeleteVertexArrays(1, &vao));
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glAssert(glDeleteBuffers(nb_buffers, vbo));
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}
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void PhongEntity::drawGroup(int groupId)
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{
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glAssert(glBindVertexArray(vao));
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[POSITION_BUFFER]));
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glAssert(glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(glm::vec3), BUFFER_OFFSET(0)));
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glAssert(glEnableVertexAttribArray(0));
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if(mesh->hasNormals())
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{
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[NORMAL_BUFFER]));
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glAssert(glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(glm::vec3), BUFFER_OFFSET(0)));
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glAssert(glEnableVertexAttribArray(1));
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}
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if(mesh->hasTexCoords())
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{
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[TEXCOORD_BUFFER]));
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glAssert(glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec2), BUFFER_OFFSET(0)));
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glAssert(glEnableVertexAttribArray(2));
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}
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if(mesh->hasTangents())
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{
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[TANGENT_BUFFER]));
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glAssert(glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(Mesh::Tangents), BUFFER_OFFSET(0)));
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glAssert(glEnableVertexAttribArray(3));
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glAssert(glVertexAttribPointer(4, 3, GL_FLOAT, GL_FALSE, sizeof(Mesh::Tangents), BUFFER_OFFSET(sizeof(glm::vec3))));
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glAssert(glEnableVertexAttribArray(4));
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}
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glAssert(glDrawElements(GL_TRIANGLES, mesh->indiceGroups[groupId].size(), GL_UNSIGNED_INT, mesh->indiceGroups[groupId].data()));
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}
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