From fa72bdc92a02fa0bf6a8326cd976a839d16c1bfa Mon Sep 17 00:00:00 2001
From: Evert Prants <imsonotsleepy@gmail.com>
Date: Tue, 31 Dec 2019 21:36:25 +0200
Subject: [PATCH] Reduce environment lights for older gles, invert camera x
 axis

---
 assets/shaders/terrain.fs | 8 ++++----
 assets/shaders/terrain.vs | 6 +++---
 src/engine/camera.js      | 2 +-
 src/engine/environment.js | 2 +-
 src/engine/screen.js      | 2 +-
 5 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/assets/shaders/terrain.fs b/assets/shaders/terrain.fs
index 18ba9aa..0b82eb5 100644
--- a/assets/shaders/terrain.fs
+++ b/assets/shaders/terrain.fs
@@ -1,13 +1,13 @@
 precision highp float;
 
 varying vec2 uv;
-varying vec3 toLightVector[8];
+varying vec3 toLightVector[5];
 varying vec3 surfaceNormal;
 varying vec3 toCameraVector;
 
 uniform sampler2D texture0;
-uniform vec3 lightColor[8];
-uniform vec3 attenuation[8];
+uniform vec3 lightColor[5];
+uniform vec3 attenuation[5];
 
 void main() {
 	float reflectivity = 0.0;
@@ -19,7 +19,7 @@ void main() {
 	vec3 totalDiffuse = vec3(0.0);
 	vec3 totalSpecular = vec3(0.0);
 
-	for(int i=0;i<8;i++){
+	for(int i=0;i<5;i++){
 		float distance = length(toLightVector[i]);
 		float attFactor = attenuation[i].x + (attenuation[i].y * distance) + (attenuation[i].z * distance * distance);
 		vec3 unitLightVector = normalize(toLightVector[i]);
diff --git a/assets/shaders/terrain.vs b/assets/shaders/terrain.vs
index 226155d..32d5b08 100644
--- a/assets/shaders/terrain.vs
+++ b/assets/shaders/terrain.vs
@@ -7,10 +7,10 @@ attribute vec2 aTexCoords;
 uniform mat4 uModelMatrix;
 uniform mat4 uViewMatrix;
 uniform mat4 uProjectionMatrix;
-uniform vec3 lightPosition[8];
+uniform vec3 lightPosition[5];
 
 varying vec2 uv;
-varying vec3 toLightVector[8];
+varying vec3 toLightVector[5];
 varying vec3 surfaceNormal;
 varying vec3 toCameraVector;
 
@@ -60,7 +60,7 @@ void main() {
 	gl_Position = uProjectionMatrix * uViewMatrix * worldPosition;
 	uv = aTexCoords;
 	surfaceNormal = (uModelMatrix * vec4(aNormal,0.0)).xyz;
-	for(int i=0;i<8;i++){
+	for(int i=0;i<5;i++){
 		toLightVector[i] = lightPosition[i] - worldPosition.xyz;
 	}
 	toCameraVector = (inverse(uViewMatrix) * vec4(0.0,0.0,0.0,1.0)).xyz - worldPosition.xyz;
diff --git a/src/engine/camera.js b/src/engine/camera.js
index 97a83af..b0da3db 100644
--- a/src/engine/camera.js
+++ b/src/engine/camera.js
@@ -57,7 +57,7 @@ class Camera extends Node {
   }
 
   processMouseMove (offset, constrain = true) {
-    let fst = vec2.fromValues(offset.x * this.sensitivity, offset.y * this.sensitivity)
+    let fst = vec2.fromValues(offset.x * -this.sensitivity, offset.y * this.sensitivity)
     this.rotation[0] += glMatrix.toRadian(fst[0])
     this.rotation[1] += glMatrix.toRadian(fst[1])
 
diff --git a/src/engine/environment.js b/src/engine/environment.js
index b92eabe..54f6e26 100644
--- a/src/engine/environment.js
+++ b/src/engine/environment.js
@@ -1,5 +1,5 @@
 
-const ENV_MAX_LIGHTS = 8
+const ENV_MAX_LIGHTS = 5
 
 class Light {
   constructor (pos, color, attenuation = [1.0, 0.0, 0.0]) {
diff --git a/src/engine/screen.js b/src/engine/screen.js
index 4928241..14adc24 100644
--- a/src/engine/screen.js
+++ b/src/engine/screen.js
@@ -29,7 +29,7 @@ class Screen {
   }
 
   loadExtensions () {
-    this._gl.drawBuffers = this._gl.getExtension('WEBGL_draw_buffers')
+    // this._gl.drawBuffers = this._gl.getExtension('WEBGL_draw_buffers')
     this._gl.getExtension('WEBGL_depth_texture')
     this._gl.getExtension('OES_texture_float')
   }