From e02d223574b19f4f8af86f6d2639da7df6f07095 Mon Sep 17 00:00:00 2001
From: Faerbit <faerbit@gmail.com>
Date: Sat, 7 Mar 2015 18:25:14 +0100
Subject: [PATCH] Reintroduced night texture. Throw a bunch of stuff out.

---
 data/shader/skydome.fsh | 27 ++------------------------
 graphics.cc             | 42 ++++-------------------------------------
 graphics.hh             |  4 ----
 3 files changed, 6 insertions(+), 67 deletions(-)

diff --git a/data/shader/skydome.fsh b/data/shader/skydome.fsh
index 9d4ff71..3ea54ca 100644
--- a/data/shader/skydome.fsh
+++ b/data/shader/skydome.fsh
@@ -7,44 +7,21 @@ in vec4 sunPosition;
 out vec4 oColor;
 
 uniform sampler2D uTexture;
+uniform sampler2D nightTexture;
 uniform float farPlane;
 uniform vec4 fogColor;
 uniform vec3 cameraCenter;
 uniform vec3 sunColor;
 uniform vec3 directionalVector;
-uniform float skydomeSize;
 
 const float sunSize = 20.0;
-const float starSize = 1.0;
-const vec4 starColor = vec4(1.0, 1.0, 0.9, 1.0);
-
-const int starCount = 2;
-vec3 starPositions[starCount] = vec3[](
-    vec3(-0.3102524288591748, 0.9505037096381865, -0.016915328877346533),
-    vec3(-0.14085574439428544, 0.9519584459035886, -0.27190950065041153)
-);
-
-float starSizes[starCount] = float[] (
-    float(0.5),
-    float(1.2)
-);
 
 void main() {
     vec4 textureColor = vec4(0.0, 0.0, 0.0, 1.0);
     float sunAngle = -dot(normalize(directionalVector), vec3(0.0, 1.0, 0.0));
     vec4 dayColor = texture(uTexture, vTexCoord);
     if (sunAngle >= 0.0) {
-        vec4 nightColor = vec4(0.0, 0.0, 0.0, 1.0);
-        for(int i = 0; i<starCount; i++) {
-            vec3 starPosition = (starPositions[i] * skydomeSize) + vec3(cameraCenter.x, 0.0, cameraCenter.z);
-            float distanceToStar = distance(starPosition, vec3(fragPosition));
-            float thisStarSize = starSize * starSizes[i];
-            if (distanceToStar < thisStarSize) {
-                float starIntensity = clamp(0.3*exp(1/(distanceToStar/thisStarSize))-exp(1.0)*0.3, 0.0, 1.0);
-                nightColor = mix(nightColor, starColor, starIntensity);
-            }
-        }
-        textureColor = mix(dayColor, nightColor, sunAngle);
+        textureColor = mix(dayColor, texture(nightTexture, vTexCoord), sunAngle);
     }
     else {
         textureColor = dayColor;
diff --git a/graphics.cc b/graphics.cc
index f741754..36fda09 100644
--- a/graphics.cc
+++ b/graphics.cc
@@ -90,20 +90,14 @@ void Graphics::init(Level* level) {
     flameShader = ShaderProgramCreator("flame")
         .attributeLocations(flame_positions->getAttributeLocations()).create();
 
-    flameColorShader = ShaderProgramCreator("flame_color")
-        .attributeLocations(fullscreen_quad->getAttributeLocations()).create();
-
     flamePostShader = ShaderProgramCreator("flame_post")
         .attributeLocations(fullscreen_quad->getAttributeLocations()).create();
 
-    mergeShader = ShaderProgramCreator("merge")
-        .attributeLocations(fullscreen_quad->getAttributeLocations()).create();
-
     glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &number_of_texture_units);
     printf("Your graphics card supports %d texture units.\n", number_of_texture_units);
     // Exit if we need more texture units
-    if (number_of_texture_units < 18) {
-        printf("You need at least 18 texture units to run this application. Exiting\n");
+    if (number_of_texture_units < 16) {
+        printf("You need at least 16 texture units to run this application. Exiting\n");
         exit(-1);
     }
 
@@ -173,23 +167,8 @@ void Graphics::init(Level* level) {
     flamePostShader->setUniform("windowSizeX", int(windowSize.x));
     flamePostShader->setUniform("windowSizeY", int(windowSize.y));
 
-    flame_fbo_color_texture = SharedTexture2D(new Texture2D(windowSize, GL_RGBA8));
-    flame_fbo_color_texture->setMinFilter(GL_NEAREST);
-    flame_fbo_color_texture->setMagFilter(GL_NEAREST);
-    flame_fbo_color_texture->setWrapS(GL_CLAMP_TO_BORDER);
-    flame_fbo_color_texture->setWrapT(GL_CLAMP_TO_BORDER);
-    framebuffer_flame = SharedFrameBufferObject(new FrameBufferObject());
-    framebuffer_flame->attachColorTexture("oColor", flame_fbo_color_texture);
-    framebuffer_flame->setDepthTexture(light_fbo_depth_texture);
-    framebuffer_flame->setClearColor(glm::vec4(0.0f, 0.0f, 0.0f, 0.0f));
-    framebuffer_flame->validate();
-
-    mergeShader->use();
-    mergeShader->setTexture("flame_fbo", flame_fbo_color_texture, 15);
-    mergeShader->setTexture("light_fbo", light_fbo_color_texture, 16);
-
-    flameColorShader->use();
-    flameColorShader->setTexture("flame_fbo", flame_fbo_color_texture, 17);
+    skydomeShader->use();
+    skydomeShader->setTexture("nightTexture", level->getSkydome()->getNightTexture()->getReference(), 15);
 
     updateClosestLights();
 }
@@ -322,8 +301,6 @@ void Graphics::render(double time)
 
     // draw flames on top
     flameShader->use();
-    framebuffer_flame->bind();
-    glClear(GL_COLOR_BUFFER_BIT);
     // cull faces to get consistent color while using alpha
     glEnable(GL_CULL_FACE);
     glCullFace(GL_BACK);
@@ -345,17 +322,6 @@ void Graphics::render(double time)
     flame_positions->render();
     glDisable(GL_CULL_FACE);
 
-    glDepthMask(GL_FALSE);
-    flameColorShader->use();
-    fullscreen_quad->render();
-
-    framebuffer_light->bind();
-    mergeShader->use();
-    glDisable(GL_DEPTH_TEST);
-    fullscreen_quad->render();
-    glEnable(GL_DEPTH_TEST);
-
-
     // draw slightly larger only for stencil buffer to blur edges
     flameShader->use();
     glEnable(GL_STENCIL_TEST);
diff --git a/graphics.hh b/graphics.hh
index 2e63246..3e5358a 100644
--- a/graphics.hh
+++ b/graphics.hh
@@ -35,16 +35,12 @@ class Graphics {
         SharedShaderProgram depthCubeShader;
         SharedShaderProgram depthShader;
         SharedShaderProgram flameShader;
-        SharedShaderProgram flameColorShader;
         SharedShaderProgram flamePostShader;
-        SharedShaderProgram mergeShader;
         std::vector<SharedTexture2D> depth_directionalMaps;
         std::vector<SharedFrameBufferObject> framebuffer_directional;
         std::vector<SharedTextureCubeMap> depth_cubeMaps;
         SharedFrameBufferObject framebuffer_cube;
         SharedFrameBufferObject framebuffer_light;
-        SharedFrameBufferObject framebuffer_flame;
-        SharedTexture2D flame_fbo_color_texture;
         SharedTexture2D light_fbo_color_texture;
         SharedTexture2D light_fbo_depth_texture;
         SharedVertexArrayObject flame_positions;