[WIP] Added the simplex sampler to opengl water shader

src/basics/NoiseFunctionSimplex.cpp

@@ -9,6 +9,8 @@
 #include <cstdlib>
 #include <cmath>
 #include <cstring>
+#include "Texture2D.h"
+#include "Color.h"
 
 typedef struct
 {
@@ -475,3 +477,26 @@ double noiseSimplexGet4DValue(double x, double y, double z, double w)
     /* Sum up and scale the result to cover the range [-0.5,0.5] */
     return 13.5 * (n0 + n1 + n2 + n3 + n4) + 0.5;
 }
+
+
+static Texture2D *_sampleTexture = NULL;
+
+const Texture2D *NoiseFunctionSimplex::getSampleTexture()
+{
+    const int width = 1024;
+    const int height = 1024;
+    if (!_sampleTexture)
+    {
+        _sampleTexture = new Texture2D(width, height);
+        for (int x = 0; x < width; x++)
+        {
+            for (int z = 0; z < height; z++)
+            {
+                double val = noiseSimplexGet2DValue((double)x, (double)z);
+                _sampleTexture->setPixel(x, z, Color(val, val, val));
+            }
+        }
+    }
+
+    return _sampleTexture;
+}

src/basics/NoiseFunctionSimplex.h

@@ -9,7 +9,7 @@ namespace basics {
 class NoiseFunctionSimplex
 {
 public:
-    NoiseFunctionSimplex();
+    static const Texture2D *getSampleTexture();
 };
 
 }

src/render/opengl/ExplorerChunkTerrain.cpp

@@ -272,9 +272,9 @@ void ExplorerChunkTerrain::render(QOpenGLShaderProgram* program, OpenGLFunctions
 
         _lock_data.lock();
         // TEMP
-        functions->glActiveTexture(GL_TEXTURE0 + 3);
+        functions->glActiveTexture(GL_TEXTURE0 + 7);
         functions->glBindTexture(GL_TEXTURE_2D, texture_id);
-        program->setUniformValue("groundTexture", 3);
+        program->setUniformValue("groundTexture", 7);
         tessellated->render(program, functions);
         _lock_data.unlock();
     }

src/render/opengl/OpenGLSharedState.h

@@ -28,9 +28,9 @@ public:
     OpenGLVariable *get(const std::string &name);
 
     // Shortcuts
-    inline void set(const std::string &name, const Texture2D *texture) {get(name)->set(texture);}
+    inline void set(const std::string &name, const Texture2D *texture, bool repeat=false, bool color=true) {get(name)->set(texture, repeat, color);}
-    inline void set(const std::string &name, const Texture3D *texture) {get(name)->set(texture);}
+    inline void set(const std::string &name, const Texture3D *texture, bool repeat=false, bool color=true) {get(name)->set(texture, repeat, color);}
-    inline void set(const std::string &name, const Texture4D *texture) {get(name)->set(texture);}
+    inline void set(const std::string &name, const Texture4D *texture, bool repeat=false, bool color=true) {get(name)->set(texture, repeat, color);}
     inline void set(const std::string &name, float value) {get(name)->set(value);}
     inline void set(const std::string &name, const Vector3 &vector) {get(name)->set(vector);}
     inline void set(const std::string &name, const QVector3D &vector) {get(name)->set(vector);}

src/render/opengl/OpenGLVariable.cpp

@@ -62,31 +62,37 @@ void OpenGLVariable::apply(OpenGLShaderProgram *program, int &texture_unit)
     }
 }
 
-void OpenGLVariable::set(const Texture2D *texture)
+void OpenGLVariable::set(const Texture2D *texture, bool repeat, bool color)
 {
     assert(type == TYPE_NONE or type == TYPE_TEXTURE_2D);
 
     type = TYPE_TEXTURE_2D;
     value_tex2d = texture;
     texture_toupload = true;
+    texture_repeat = repeat;
+    texture_color = color;
 }
 
-void OpenGLVariable::set(const Texture3D *texture)
+void OpenGLVariable::set(const Texture3D *texture, bool repeat, bool color)
 {
     assert(type == TYPE_NONE or type == TYPE_TEXTURE_3D);
 
     type = TYPE_TEXTURE_3D;
     value_tex3d = texture;
     texture_toupload = true;
+    texture_repeat = repeat;
+    texture_color = color;
 }
 
-void OpenGLVariable::set(const Texture4D *texture)
+void OpenGLVariable::set(const Texture4D *texture, bool repeat, bool color)
 {
     assert(type == TYPE_NONE or type == TYPE_TEXTURE_4D);
 
     type = TYPE_TEXTURE_4D;
     value_tex4d = texture;
     texture_toupload = true;
+    texture_repeat = repeat;
+    texture_color = color;
 }
 
 void OpenGLVariable::set(float value)
@@ -149,13 +155,15 @@ void OpenGLVariable::uploadTexture(OpenGLRenderer* renderer)
     functions->glBindTexture(textype, texture_id);
     functions->glTexParameteri(textype, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     functions->glTexParameteri(textype, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    functions->glTexParameteri(textype, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    functions->glTexParameteri(textype, GL_TEXTURE_WRAP_S, texture_repeat ? GL_REPEAT : GL_CLAMP_TO_EDGE);
-    functions->glTexParameteri(textype, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    functions->glTexParameteri(textype, GL_TEXTURE_WRAP_T, texture_repeat ? GL_REPEAT : GL_CLAMP_TO_EDGE);
     if (textype == GL_TEXTURE_3D)
     {
-        functions->glTexParameteri(textype, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+        functions->glTexParameteri(textype, GL_TEXTURE_WRAP_R, texture_repeat ? GL_REPEAT : GL_CLAMP_TO_EDGE);
     }
 
+    int dest_format = texture_color ? GL_RGBA : GL_RED;
+
     if (type == TYPE_TEXTURE_2D)
     {
         int sx, sy;
@@ -174,7 +182,7 @@ void OpenGLVariable::uploadTexture(OpenGLRenderer* renderer)
             }
         }
 
-        functions->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, sx, sy, 0, GL_RGBA, GL_FLOAT, pixels);
+        functions->glTexImage2D(GL_TEXTURE_2D, 0, dest_format, sx, sy, 0, GL_RGBA, GL_FLOAT, pixels);
         delete[] pixels;
     }
     else if (type == TYPE_TEXTURE_3D)
@@ -198,7 +206,7 @@ void OpenGLVariable::uploadTexture(OpenGLRenderer* renderer)
             }
         }
 
-        functions->glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, sx, sy, sz, 0, GL_RGBA, GL_FLOAT, pixels);
+        functions->glTexImage3D(GL_TEXTURE_3D, 0, dest_format, sx, sy, sz, 0, GL_RGBA, GL_FLOAT, pixels);
         delete[] pixels;
     }
     else
@@ -225,7 +233,7 @@ void OpenGLVariable::uploadTexture(OpenGLRenderer* renderer)
             }
         }
 
-        functions->glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, sx, sy, sz * sw, 0, GL_RGBA, GL_FLOAT, pixels);
+        functions->glTexImage3D(GL_TEXTURE_3D, 0, dest_format, sx, sy, sz * sw, 0, GL_RGBA, GL_FLOAT, pixels);
         delete[] pixels;
     }
 }

src/render/opengl/OpenGLVariable.h

@@ -32,9 +32,9 @@ public:
 
     void apply(OpenGLShaderProgram *program, int &texture_unit);
 
-    void set(const Texture2D *texture);
+    void set(const Texture2D *texture, bool repeat=false, bool color=true);
-    void set(const Texture3D *texture);
+    void set(const Texture3D *texture, bool repeat=false, bool color=true);
-    void set(const Texture4D *texture);
+    void set(const Texture4D *texture, bool repeat=false, bool color=true);
     void set(float value);
     void set(const Vector3 &vector);
     void set(const QVector3D &vector);
@@ -58,6 +58,8 @@ private:
     const Texture4D* value_tex4d;
 
     bool texture_toupload;
+    bool texture_repeat;
+    bool texture_color;
     unsigned int texture_id;
 };
 

src/render/opengl/OpenGLWater.cpp

@@ -7,6 +7,7 @@
 #include "Scenery.h"
 #include "WaterDefinition.h"
 #include "SurfaceMaterial.h"
+#include "NoiseFunctionSimplex.h"
 
 OpenGLWater::OpenGLWater(OpenGLRenderer *renderer):
     OpenGLPart(renderer)
@@ -41,6 +42,8 @@ void OpenGLWater::update()
 
     Color water_color = renderer->getScenery()->getWater()->material->_rgb;
     renderer->getSharedState()->set("waterColor", water_color);
+
+    renderer->getSharedState()->set("simplexSampler", NoiseFunctionSimplex::getSampleTexture(), true, false);
 }
 
 void OpenGLWater::render()

src/render/opengl/shaders/water.frag

@@ -1,8 +1,10 @@
 uniform vec4 waterColor;
+uniform sampler2D simplexSampler;
 
 void main(void)
 {
-    gl_FragColor = waterColor;
+    //gl_FragColor = waterColor;
+    gl_FragColor = texture2D(simplexSampler, unprojected.xz * 0.01);
 
     gl_FragColor = applyAerialPerspective(gl_FragColor);