src/model.cpp

   1 #include "model.hpp"
   2
   3
   4 namespace blank {
   5
   6 Model::Model(
   7         std::vector<glm::vec3> &&vtx,
   8         std::vector<glm::vec3> &&col,
   9         std::vector<glm::vec3> &&norm
  10 )
  11 : vertices(vtx)
  12 , colors(col)
  13 , normals(norm)
  14 , handle{} {
  15         glGenBuffers(ATTRIB_COUNT, handle);
  16
  17         glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
  18         glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(glm::vec3), vertices.data(), GL_STATIC_DRAW);
  19
  20         glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_COLOR]);
  21         glBufferData(GL_ARRAY_BUFFER, colors.size() * sizeof(glm::vec3), colors.data(), GL_STATIC_DRAW);
  22
  23         glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_NORMAL]);
  24         glBufferData(GL_ARRAY_BUFFER, normals.size() * sizeof(glm::vec3), normals.data(), GL_STATIC_DRAW);
  25 }
  26
  27 Model::~Model() {
  28         glDeleteBuffers(ATTRIB_COUNT, handle);
  29 }
  30
  31
  32 void Model::Draw() {
  33         glEnableVertexAttribArray(ATTRIB_VERTEX);
  34         glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_VERTEX]);
  35         glVertexAttribPointer(
  36                 ATTRIB_VERTEX, // location (for shader)
  37                 3,             // size
  38                 GL_FLOAT,      // type
  39                 GL_FALSE,      // normalized
  40                 0,             // stride
  41                 nullptr        // offset
  42         );
  43
  44         glEnableVertexAttribArray(ATTRIB_COLOR);
  45         glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_COLOR]);
  46         glVertexAttribPointer(
  47                 ATTRIB_COLOR,  // location (for shader)
  48                 3,             // size
  49                 GL_FLOAT,      // type
  50                 GL_FALSE,      // normalized
  51                 0,             // stride
  52                 nullptr        // offset
  53         );
  54
  55         glEnableVertexAttribArray(ATTRIB_NORMAL);
  56         glBindBuffer(GL_ARRAY_BUFFER, handle[ATTRIB_NORMAL]);
  57         glVertexAttribPointer(
  58                 ATTRIB_NORMAL, // location (for shader)
  59                 3,             // size
  60                 GL_FLOAT,      // type
  61                 GL_FALSE,      // normalized
  62                 0,             // stride
  63                 nullptr        // offset
  64         );
  65
  66         glDrawArrays(
  67                 GL_TRIANGLES,   // how
  68                 0,              // start
  69                 vertices.size() // len
  70         );
  71
  72         glDisableVertexAttribArray(ATTRIB_NORMAL);
  73         glDisableVertexAttribArray(ATTRIB_COLOR);
  74         glDisableVertexAttribArray(ATTRIB_VERTEX);
  75 }
  76
  77 }