bool LinkShaderPrograms()
{
shVertex.LoadShader("shaders/VertexShader.glsl", GL_VERTEX_SHADER);
shFragment.LoadShader("shaders/FragmentShader.glsl", GL_FRAGMENT_SHADER);
shpMain.CreateProgram();
shpMain.AddShaderToProgram(&shVertex);
shpMain.AddShaderToProgram(&shFragment);
shpMain.LinkProgram();
if (!shpMain.LinkProgram())
{
return false;
}
return true;
}
void InitScene(LPVOID lpParam)
{
// clear rendering window
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
/////Load assets bind shaders here/////
VBOScene.CreateVBO();
glGenVertexArrays(1, &uVAO); // Create one VAO
glBindVertexArray(uVAO);
VBOScene.BindVBO();
// Add cube to VBO
for (int i = 0; i < 36; i++)
{
VBOScene.AddData(&vCubeVertices[i], sizeof(glm::vec3));
VBOScene.AddData(&vCubeTexCoords[i % 6], sizeof(glm::vec2));
}
// Add pyramid to VBO
for (int i = 0; i < 12; i++)
{
VBOScene.AddData(&vPyramidVertices[i], sizeof(glm::vec3));
VBOScene.AddData(&vPyramidTexCoords[i % 3], sizeof(glm::vec2));
}
// Add ground to VBO
for (int i = 0; i < 6; i++)
{
VBOScene.AddData(&vGround[i], sizeof(glm::vec3));
vCubeTexCoords[i] *= 5.0f;
VBOScene.AddData(&vCubeTexCoords[i % 6], sizeof(glm::vec2));
}
VBOScene.LoadDataToGPU(GL_STATIC_DRAW);
// Vertex positions start on zero index, and distance between two consecutive is sizeof whole
// vertex data (position and tex. coord)
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(glm::vec3) + sizeof(glm::vec2), 0);
// Texture coordinates start right after positon, thus on (sizeof(glm::vec3)) index,
// and distance between two consecutive is sizeof whole vertex data (position and tex. coord)
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(glm::vec3) + sizeof(glm::vec2), (void*)sizeof(glm::vec3));
// Load shaders and create shader program
vShader.LoadShader("data\\Shaders\\scene.vert", GL_VERTEX_SHADER);
fShader.LoadShader("data\\Shaders\\scene.frag", GL_FRAGMENT_SHADER);
spShader.CreateShaderProgram();
spShader.AddShaderToProgram(&vShader);
spShader.AddShaderToProgram(&fShader);
spShader.LinkShader();
spShader.UseShaderProgram();
glEnable(GL_DEPTH_TEST);
glClearDepth(1.0);
// load texture
tGold.LoadTexture2D("data\\Textures\\gold.jpg", true);
tGold.SetFiltering(TEXTURE_FILTER_MAG_BILINEAR, TEXTURE_FILTER_MIN_BILINEAR_MIPMAP);
tSnow.LoadTexture2D("data\\Textures\\snow.jpg", true);
tSnow.SetFiltering(TEXTURE_FILTER_MAG_BILINEAR, TEXTURE_FILTER_MIN_BILINEAR_MIPMAP);
glEnable(GL_TEXTURE_2D);
}
// loads the vertex shader and fragment shader, and links them to make the global program
static void LoadShaders() {
std::vector<GLuint> shaders;
shaders.push_back(shader.LoadShader("vertex.glsl", GL_VERTEX_SHADER));
shaders.push_back(shader.LoadShader("fragment.glsl", GL_FRAGMENT_SHADER));
program = new Program(shaders);
}
