Well i found out Here what's the problem and how to solve it (Something about world coordinates and object coordinates) but i can't understand how ti works. Can you show me some examples in code on how you implement this???
Scaling Matrix:
m_Impl->scale = glm::mat4(1.0f);
m_Impl->scale = glm::scale(m_Impl->scale, glm::vec3(width, height, 0));Verticies:
//Verticies.
float verticies[] =
{
//Positions. //Texture Coordinates.
1.0f, 1.0f, 0.0f, 0.0f,
2.0f, 1.0f, 1.0f, 0.0f,
2.0f, 2.0f, 1.0f, 1.0f,
1.0f, 2.0f, 0.0f, 1.0f
};Rendering:
//Projection Matrix.
glm::mat4 proj = glm::ortho(0.0f, (float)window->GetWidth(), 0.0f, (float)window->GetHeight(), -1.0f, 1.0f);
//Set the uniform.
material->program->setUniformMat4f("u_MVP", proj * model); //model is the scale matrix from the previous code.
//Draw.
glDrawElements(GL_TRIANGLES, material->ibo->GetCount(), GL_UNSIGNED_INT, NULL);
Shader:
#shader vertex
#version 330 core
layout(location = 0) in vec4 aPos;
layout(location = 1) in vec2 aTexCoord;
out vec2 texCoord;
uniform mat4 u_MVP;
void main()
{
gl_Position = u_MVP*aPos;
texCoord = aTexCoord;
}
#shader fragment
#version 330 core
out vec4 colors;
in vec2 texCoord;
uniform sampler2D u_Texture;
void main()
{
colors = texture(u_Texture, texCoord);
}
Before Scaling (It's down there on the bottom left corner as a dot).
After Scaling
Problem: Why does the position also changes?? If you see my Verticies, the first position starts at 1.0f, 1.0f , so when i'm scaling it should stay at that position
