improved software shaders

- unified terminal and graphical software renderer shaders
- added vertex shaders for software renderers
- removed VertexData
- moved shaders from frame buffers to their own class
- added FrameBufferConcept and ShadersConcept

1 files changed, 3 insertions, 10 deletions

diff --git a/src/fb/chfb.cpp b/src/fb/chfb.cpp
index 7341015..e7717eb 100644
--- a/src/fb/chfb.cpp
+++ b/src/fb/chfb.cpp
@@ -3,15 +3,10 @@
 #include <cstdint>
 #include "math/vector.hpp"
 #include "math/quat.hpp"
-#include "o3d/vertex_data.hpp"
 #include "o3d/camera.hpp"
 
 using namespace engine::fb;
-using
-    engine::math::Vector2,
-    engine::math::Vector3,
-    engine::o3d::VertexData,
-    engine::o3d::Camera;
+using engine::math::Vector4;
 
 CharacterFrameBuffer::CharacterFrameBuffer(unsigned int w, unsigned int h) {
     resize(w, h);
@@ -30,11 +25,9 @@ void CharacterFrameBuffer::clear() {
 
 // taken from https://stackoverflow.com/a/74186686
 char brightness_chars[] = " `.-':_,^=;><+!rc*/z?sLTv)J7(|Fi{C}fI31tlu[neoZ5Yxjya]2ESwqkP6h9d4VpOGbUAKXHm8RD#$Bg0MNWQ%&@";
-extern Camera* camera;
 
-void CharacterFrameBuffer::draw_point(int x, int y, const Vector3& /* loc */, const Vector3& normal, const Vector2& /* uv */, const VertexData& /* vd */) {
-    auto v = camera->transform.rot.conjugate().rot(normal).normalize();
-    float light = .1f + (v.z < 0.f ? 0.f : v.z) * .9f;
+void CharacterFrameBuffer::draw_point(int x, int y, const Vector4& point) {
+    float light = .2126f * point.x + .7152f * point.y + .0722f * point.z;
     std::uint32_t c = (int) (light * static_cast<float>(sizeof(brightness_chars) - 1));
     chars_vector[x + y * w] = brightness_chars[c];
 }