Added fit, fixed the layer -1 bug finally, refactored here and there

src/canvas.cpp

@@ -240,37 +240,4 @@ void canvas_free(Canvas* self)
     glDeleteBuffers(1, &self->gridVBO);
     glDeleteBuffers(1, &self->textureVBO);
     glDeleteBuffers(1, &self->textureEBO);
-}
-
-mat4 canvas_model_get(vec2 size, vec2 position, vec2 pivot, vec2 scale, f32 rotation)
-{
-    vec2 scaleAbsolute  = glm::abs(scale);
-    vec2 scaleSign = glm::sign(scale);
-    vec2 pivotScaled = pivot * scaleAbsolute;
-    vec2 sizeScaled  = size  * scaleAbsolute;
-
-    mat4 model(1.0f);
-    model = glm::translate(model, vec3(position - pivotScaled, 0.0f));
-    model = glm::translate(model, vec3(pivotScaled, 0.0f));
-    model = glm::scale(model, vec3(scaleSign, 1.0f));
-    model = glm::rotate(model, glm::radians(rotation), vec3(0, 0, 1));
-    model = glm::translate(model, vec3(-pivotScaled, 0.0f));
-    model = glm::scale(model, vec3(sizeScaled, 1.0f));
-    return model;
-}
-
-mat4 canvas_parent_model_get(vec2 position, vec2 pivot, vec2 scale, f32 rotation)
-{
-    vec2 scaleSign = glm::sign(scale);
-    vec2 scaleAbsolute  = glm::abs(scale);
-    f32 handedness = (scaleSign.x * scaleSign.y) < 0.0f ? -1.0f : 1.0f;
-
-    mat4 local(1.0f);
-    local = glm::translate(local, vec3(pivot, 0.0f));
-    local = glm::scale(local, vec3(scaleSign, 1.0f));
-    local = glm::rotate(local, glm::radians(rotation) * handedness, vec3(0, 0, 1));
-    local = glm::translate(local, vec3(-pivot, 0.0f));
-    local = glm::scale(local, vec3(scaleAbsolute, 1.0f));
-
-    return glm::translate(mat4(1.0f), vec3(position, 0.0f)) * local;
 }