//--------------------------------------------------
// AssimpPainter
//--------------------------------------------------
void AssimpPainter::DrawMesh(
const Shader& shader,
GLuint vao,
const Mesh& mesh) const
{
shader.Use();
// Bind appropriate textures
GLuint diffuseNr = 1;
GLuint specularNr = 1;
// Bind textures
std::vector<Texture>::size_type index2 = 0;
for(Texture texture : mesh.textures)
{
glActiveTexture(GL_TEXTURE0 + (GLuint)index2);
// Retrieve texture number (the N in diffuse_textureN)
std::string number;
TextureType type = texture.type;
// Transfer GLuint to stream
switch(type)
{
case TextureType::DIFFUSE:
number += (char)diffuseNr++;
break;
case TextureType::SPECULAR:
number += (char)specularNr++;
break;
default:
break;
}
// Now set the sampler to the correct texture unit
glUniform1i(
glGetUniformLocation(shader.GetProgID(), ("material." + TextureTypeNames[(size_t)type] + number).c_str()),
(GLuint)index2);
// And finally bind the texture
glBindTexture(GL_TEXTURE_2D, texture.id);
index2++;
}
// Also set each mesh's shininess property to a default value
// (if you want you could extend this to another mesh property and possibly change this value)
glUniform1f(glGetUniformLocation(shader.GetProgID(), "material.shininess"), 16.0f);
// Draw mesh
glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh.ebo);
glDrawElements(
GL_TRIANGLES,
(GLsizei)mesh.indices.size(),
GL_UNSIGNED_INT,
0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindVertexArray(0);
// "Unbind" textures
index2 = 0;
for(Texture texture : mesh.textures)
{
glActiveTexture(GL_TEXTURE0 + (GLuint)index2);
glBindTexture(GL_TEXTURE_2D, 0);
}
}
