From 3d2deaf36911761d64e518fda8a17beb82b93872 Mon Sep 17 00:00:00 2001
From: MihailRis <mexaruc@gmail.com>
Date: Thu, 20 Jun 2024 20:15:03 +0300
Subject: [PATCH] add ModelBatch pseudo-lights

---
 src/graphics/render/ModelBatch.cpp    | 12 ++++++++----
 src/graphics/render/ModelBatch.hpp    |  9 +++++++--
 src/graphics/render/WorldRenderer.cpp |  1 +
 3 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/src/graphics/render/ModelBatch.cpp b/src/graphics/render/ModelBatch.cpp
index 9d0337901..e1362bb58 100644
--- a/src/graphics/render/ModelBatch.cpp
+++ b/src/graphics/render/ModelBatch.cpp
@@ -4,6 +4,7 @@
 #include "../core/Texture.hpp"
 #include "../../window/Window.hpp"
 
+#define GLM_ENABLE_EXPERIMENTAL
 #include <glm/ext/matrix_transform.hpp>
 #include <glm/gtx/matrix_decompose.hpp>
 #include <glm/gtx/quaternion.hpp>
@@ -15,7 +16,6 @@ static const vattr attrs[] = {
     {3}, {2}, {1}, {0}
 };
 
-static glm::vec3 SUN_VECTOR (0.411934f, 0.863868f, -0.279161f);
 inline constexpr glm::vec3 X(1, 0, 0);
 inline constexpr glm::vec3 Y(0, 1, 0);
 inline constexpr glm::vec3 Z(0, 0, 1);
@@ -39,12 +39,16 @@ ModelBatch::~ModelBatch() {
 void ModelBatch::test(glm::vec3 pos, glm::vec3 size) {
     float time = static_cast<float>(Window::time());
     pushMatrix(glm::translate(glm::mat4(1.0f), pos));
-    pushMatrix(glm::rotate(glm::mat4(1.0f), time, glm::vec3(0,1,0)));
+    pushMatrix(glm::rotate(glm::mat4(1.0f), glm::sin(time*7*0.1f), glm::vec3(0,1,0)));
+    pushMatrix(glm::rotate(glm::mat4(1.0f), glm::sin(time*11*0.1f), glm::vec3(1,0,0)));
+    pushMatrix(glm::rotate(glm::mat4(1.0f), glm::sin(time*17*0.1f), glm::vec3(0,0,1)));
     pushMatrix(glm::translate(glm::mat4(1.0f), glm::vec3(0, glm::sin(time*2), 0)));
     box({}, size);
     popMatrix();
     popMatrix();
     popMatrix();
+    popMatrix();
+    popMatrix();
 }
 
 void ModelBatch::box(glm::vec3 pos, glm::vec3 size) {
@@ -62,7 +66,7 @@ void ModelBatch::flush() {
     if (index == 0) {
         return;
     }
-    blank->bind();
+    // blank->bind();
     mesh->reload(buffer.get(), index / VERTEX_SIZE);
     mesh->draw();
     index = 0;
@@ -70,7 +74,7 @@ void ModelBatch::flush() {
 
 void ModelBatch::pushMatrix(glm::mat4 matrix) {
     matrices.push_back(combined);
-    combined = matrix * combined;
+    combined = combined * matrix;
 
     decomposed = {};
     glm::quat rotation;
diff --git a/src/graphics/render/ModelBatch.hpp b/src/graphics/render/ModelBatch.hpp
index 848a84d3e..26b8c601c 100644
--- a/src/graphics/render/ModelBatch.hpp
+++ b/src/graphics/render/ModelBatch.hpp
@@ -15,7 +15,7 @@ struct DecomposedMat4 {
     glm::vec3 skew;
     glm::vec4 perspective;
 };
-#include <iostream>
+
 class ModelBatch {
     std::unique_ptr<float[]> buffer;
     size_t capacity;
@@ -29,6 +29,8 @@ class ModelBatch {
 
     DecomposedMat4 decomposed {};
 
+    static inline glm::vec3 SUN_VECTOR {0.411934f, 0.863868f, -0.279161f};
+
     inline void vertex(
         glm::vec3 pos, glm::vec2 uv, glm::vec4 color
     ) {
@@ -55,7 +57,10 @@ class ModelBatch {
 
     inline void plane(glm::vec3 pos, glm::vec3 right, glm::vec3 up, glm::vec3 norm) {
         norm = decomposed.rotation * norm;
-        glm::vec4 color {norm.x, norm.y, norm.z, 0.0f};
+        float d = glm::dot(norm, SUN_VECTOR);
+        d = 0.8f + d * 0.2f;
+        
+        glm::vec4 color {d, d, d, 0.0f};
         color.r = glm::max(0.0f, color.r);
         color.g = glm::max(0.0f, color.g);
         color.b = glm::max(0.0f, color.b);
diff --git a/src/graphics/render/WorldRenderer.cpp b/src/graphics/render/WorldRenderer.cpp
index fe49d8bc4..4b678dcb7 100644
--- a/src/graphics/render/WorldRenderer.cpp
+++ b/src/graphics/render/WorldRenderer.cpp
@@ -193,6 +193,7 @@ void WorldRenderer::renderLevel(
 
     drawChunks(level->chunks.get(), camera, shader);
 
+    assets->getTexture("gui/menubg")->bind();
     shader->uniformMatrix("u_model", glm::mat4(1.0f));
     modelBatch->test(glm::vec3(0, 68, 0), glm::vec3(1.0f));
     modelBatch->flush();