paysages : New texture model (WIP).

git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@317 b1fd45b6-86a6-48da-8261-f70d1f35bdcc

ChangeLog

@@ -2,8 +2,9 @@
 -------------------------------
 * Previews scaling is now logarithmic (slower when zoomed).
 * Previews drawing now takes advantage of multiple CPUs.
-* New displacement mode for textures (perpendicular to local ground surface).
+* New texture model (perpendicular displacement and thickness).
 * Added clouds hardness to light.
+* Version management in saved files.
 
 2012-04-20 Technology Preview 1
 -------------------------------

TODO

@@ -1,6 +1,9 @@
 Technology Preview 2 :
+- Interface for textures thickness and slope_range.
 - Render tab previews should not rerender when changing render options.
-- Compute shadows only once for all textures at a same location (need an intermediary light status).
+- Compute shadows only once for all textures at a same location.
+   => Add an intermediary light status (two pass lighting).
+- Don't change opacity when scrolling previews.
 - Add layer sorting/naming.
 - Save GUI config (views, render params).
 - Add an OSD ability on previews and use it for camera location and user landmarks.
@@ -9,21 +12,30 @@ Technology Preview 2 :
 - Add a terrain modifier dialog with zones.
 - Add a noise filler (and maybe noise intervals ?).
 - Improve curve editor.
+   => Add curve modes
+   => Improve curve rendering
+   => Add axis labels
 - Water and terrain LOD moves with the camera, fix it like in the wanderer.
 - Pause previews drawing of main window when a dialog is opened.
 - Interrupt preview chunk renderings that will be discarded at commit, or that are no more visible.
 - Can't overwrite picture files (ILError).
 - Fix "RGB parameters out of range" (and segfault) on preview while moving render params fast in render tab.
+   => May need to change the updateData system.
+   => Previews need to be paused while updating data.
 - When there are two previews in the same view, balance rendering between the two.
+- Lock some previews together (eg: terrain height and colored preview).
+- Find a new licence.
 
 Technology Preview 3 :
 - Restore render progress.
 - Add antialiasing option (pay attention to memory usage).
-- Add basic vegetation system (not sure).
+- Add basic vegetation system ?
+- Texture shadowing and self-shadowing ?
 - Improve sky rendering (colors and light halo).
 - Add a progress indicator on previews.
 - Multi threaded first pass.
 - Fix potential holes in land rendering.
+- Progressive final render.
 
 Release Candidate :
 - Polish all features and UI.

gui_qt/formrender.cpp

@@ -76,7 +76,7 @@ private:
 
     static Color _applyTextures(Renderer* renderer, Vector3 location, double precision)
     {
-        return texturesGetColor((TexturesDefinition*)(renderer->customData[1]), renderer, location, precision);
+        return texturesGetColor((TexturesDefinition*)(renderer->customData[1]), renderer, location.x, location.z, precision);
     }
     
     static Color _applyLightingToSurface(Renderer* renderer, Vector3 location, Vector3 normal, SurfaceMaterial material)

gui_qt/formterrain.cpp

@@ -120,7 +120,7 @@ private:
 
     static Color _applyTextures(Renderer* renderer, Vector3 location, double precision)
     {
-        return texturesGetColor((TexturesDefinition*)(renderer->customData[1]), renderer, location, precision);
+        return texturesGetColor((TexturesDefinition*)(renderer->customData[1]), renderer, location.x, location.z, precision);
     }
     
     static Color _applyLightingToSurface(Renderer* renderer, Vector3 location, Vector3 normal, SurfaceMaterial material)

lib_paysages/auto.c

@@ -96,8 +96,8 @@ void autoGenRealisticLandscape(int seed)
     water.depth_color.b = 0.3;
     water.depth_color.a = 1.0;
     water.lighting_depth = 3.0;
-    water.waves_noise_height = 0.015;
-    water.waves_noise_scale = 0.2;
+    water.waves_noise_height = 0.005;
+    water.waves_noise_scale = 0.07;
     noiseGenerateBaseNoise(water.waves_noise, 262144);
     noiseAddLevelsSimple(water.waves_noise, 2, 1.0, 1.0);
     noiseAddLevelsSimple(water.waves_noise, 3, 0.15, 0.1);
@@ -139,7 +139,7 @@ void autoGenRealisticLandscape(int seed)
     /* Terrain */
     terrain = terrainCreateDefinition();
     noiseGenerateBaseNoise(terrain.height_noise, 1048576);
-    noiseAddLevelsSimple(terrain.height_noise, 10, 1.0, 1.0);
+    noiseAddLevelsSimple(terrain.height_noise, 12, 1.0, 1.0);
     terrain.height_factor = 12.0 / noiseGetMaxValue(terrain.height_noise);
     terrain.scaling = 10.0;
     scenerySetTerrain(&terrain);
@@ -152,35 +152,44 @@ void autoGenRealisticLandscape(int seed)
     zoneAddSlopeRangeQuick(texture->zone, 1.0, 0.0, 0.0, 5.0, 5.0);
     noiseGenerateBaseNoise(texture->bump_noise, 102400);
     noiseAddLevelsSimple(texture->bump_noise, 8, 1.0, 1.0);
-    texture->bump_height = 0.1;
-    texture->bump_scaling = 0.15;
+    texture->bump_height = 0.01;
+    texture->bump_scaling = 0.015;
     texture->material.base.r = 0.6;
     texture->material.base.g = 0.55;
     texture->material.base.b = 0.57;
     texture->material.reflection = 0.2;
     texture->material.shininess = 3.0;
+    texture->thickness = 0.001;
+    texture->slope_range = 0.001;
     texture = texturesGetLayer(&textures, texturesAddLayer(&textures));
     zoneAddHeightRangeQuick(texture->zone, 1.0, -1.0, 0.0, 3.0, 15.0);
-    zoneAddSlopeRangeQuick(texture->zone, 1.0, 0.0, 0.0, 0.2, 0.3);
+    zoneAddSlopeRangeQuick(texture->zone, 1.0, 0.0, 0.0, 0.1, 0.7);
     noiseGenerateBaseNoise(texture->bump_noise, 102400);
     noiseAddLevelsSimple(texture->bump_noise, 5, 1.0, 0.4);
     noiseAddLevelsSimple(texture->bump_noise, 2, 0.03, 0.08);
-    texture->bump_height = 0.02;
-    texture->bump_scaling = 0.1;
+    texture->bump_height = 0.002;
+    texture->bump_scaling = 0.01;
     texture->material.base.r = 0.12;
     texture->material.base.g = 0.19;
     texture->material.base.b = 0.035;
     texture->material.reflection = 0.1;
     texture->material.shininess = 2.0;
-    /*texture = texturesGetLayer(&textures, texturesAddLayer(&textures));
-    zoneAddHeightRange(texture->zone, 1.0, 3.0, 4.0, 100.0, 100.0);
+    texture->thickness = 0.02;
+    texture->slope_range = 0.03;
+    texture = texturesGetLayer(&textures, texturesAddLayer(&textures));
+    zoneAddHeightRangeQuick(texture->zone, 1.0, 4.0, 5.0, 100.0, 100.0);
+    zoneAddSlopeRangeQuick(texture->zone, 1.0, 0.0, 0.0, 0.2, 1.0);
     noiseGenerateBaseNoise(texture->bump_noise, 102400);
-    noiseAddLevelsSimple(texture->bump_noise, 6, 0.04, 0.003);
-    texture->color.r = 1.0;
-    texture->color.g = 1.0;
-    texture->color.b = 1.0;
-    texturesSetDefinition(layer, texture);
-    texturesDeleteDefinition(texture);*/
+    noiseAddLevelsSimple(texture->bump_noise, 6, 1.0, 1.0);
+    texture->bump_height = 0.002;
+    texture->bump_scaling = 0.03;
+    texture->material.base.r = 1.0;
+    texture->material.base.g = 1.0;
+    texture->material.base.b = 1.0;
+    texture->material.reflection = 0.25;
+    texture->material.shininess = 0.6;
+    texture->thickness = 0.05;
+    texture->slope_range = 0.3;
     scenerySetTextures(&textures);
     texturesDeleteDefinition(&textures);
 

lib_paysages/scenery.c

@@ -285,7 +285,7 @@ static HeightInfo _getWaterHeightInfo(Renderer* renderer)
 
 static Color _applyTextures(Renderer* renderer, Vector3 location, double precision)
 {
-    return texturesGetColor(&_textures, renderer, location, precision);
+    return texturesGetColor(&_textures, renderer, location.x, location.z, precision);
 }
 
 static Color _applyAtmosphere(Renderer* renderer, Vector3 location, Color base)

lib_paysages/textures.c

@@ -37,6 +37,8 @@ void texturesSave(PackStream* stream, TexturesDefinition* definition)
         packWriteDouble(stream, &definition->textures[i].bump_height);
         packWriteDouble(stream, &definition->textures[i].bump_scaling);
         materialSave(stream, &definition->textures[i].material);
+        packWriteDouble(stream, &definition->textures[i].thickness);
+        packWriteDouble(stream, &definition->textures[i].slope_range);
     }
 }
 
@@ -60,6 +62,8 @@ void texturesLoad(PackStream* stream, TexturesDefinition* definition)
         packReadDouble(stream, &layer->bump_height);
         packReadDouble(stream, &layer->bump_scaling);
         materialLoad(stream, &layer->material);
+        packReadDouble(stream, &definition->textures[i].thickness);
+        packReadDouble(stream, &definition->textures[i].slope_range);
     }
 
     texturesValidateDefinition(definition);
@@ -120,6 +124,8 @@ TextureLayerDefinition texturesLayerCreateDefinition()
     result.material.base = COLOR_WHITE;
     result.material.reflection = 0.0;
     result.material.shininess = 0.0;
+    result.thickness = 0.0;
+    result.slope_range = 0.001;
 
     return result;
 }
@@ -135,6 +141,8 @@ void texturesLayerCopyDefinition(TextureLayerDefinition* source, TextureLayerDef
     destination->material = source->material;
     destination->bump_height = source->bump_height;
     destination->bump_scaling = source->bump_scaling;
+    destination->thickness = source->thickness;
+    destination->slope_range = source->slope_range;
     noiseCopy(source->bump_noise, destination->bump_noise);
     zoneCopy(source->zone, destination->zone);
 }
@@ -145,6 +153,10 @@ void texturesLayerValidateDefinition(TextureLayerDefinition* definition)
     {
         definition->bump_scaling = 0.000001;
     }
+    if (definition->slope_range < 0.001)
+    {
+        definition->slope_range = 0.001;
+    }
 }
 
 int texturesGetLayerCount(TexturesDefinition* definition)
@@ -191,128 +203,181 @@ void texturesDeleteLayer(TexturesDefinition* definition, int layer)
     }
 }
 
-static inline Vector3 _getPoint(TextureLayerDefinition* definition, Renderer* renderer, double x, double z, Vector3 prenormal, double scale)
-{
-    Vector3 point;
-    
-    point.x = x;
-    point.z = z;
-    point.y = renderer->getTerrainHeight(renderer, point.x, point.z);
-    
-    return v3Add(point, v3Scale(prenormal, noiseGet2DTotal(definition->bump_noise, point.x / definition->bump_scaling, point.z / definition->bump_scaling) * definition->bump_height));
-}
-
-static inline Vector3 _getPreNormal(TextureLayerDefinition* definition, Renderer* renderer, Vector3 point, double scale)
-{
-    Vector3 dpoint, ref, normal;
-    
-    /* TODO This method is better suited in terrain.c */
-
-    ref.y = 0.0;
-    point.y = renderer->getTerrainHeight(renderer, point.x, point.z);
-
-    dpoint.x = point.x + scale;
-    dpoint.z = point.z;
-    dpoint.y = renderer->getTerrainHeight(renderer, dpoint.x, dpoint.z);
-    ref.x = 0.0;
-    ref.z = 1.0;
-    normal = v3Normalize(v3Cross(ref, v3Sub(dpoint, point)));
-
-    dpoint.x = point.x;
-    dpoint.z = point.z + scale;
-    dpoint.y = renderer->getTerrainHeight(renderer, dpoint.x, dpoint.z);
-    ref.x = -1.0;
-    ref.z = 0.0;
-    normal = v3Add(normal, v3Normalize(v3Cross(ref, v3Sub(dpoint, point))));
-
-    if (renderer->render_quality > 5)
-    {
-        dpoint.x = point.x;
-        dpoint.z = point.z - scale;
-        dpoint.y = renderer->getTerrainHeight(renderer, dpoint.x, dpoint.z);
-        ref.x = 1.0;
-        ref.z = 0.0;
-        normal = v3Add(normal, v3Normalize(v3Cross(ref, v3Sub(dpoint, point))));
-
-        dpoint.x = point.x - scale;
-        dpoint.z = point.z;
-        dpoint.y = renderer->getTerrainHeight(renderer, dpoint.x, dpoint.z);
-        ref.x = 0.0;
-        ref.z = -1.0;
-        normal = v3Add(normal, v3Normalize(v3Cross(ref, v3Sub(dpoint, point))));
-    }
-
-    return v3Normalize(normal);
-}
-
-static inline Vector3 _getPostNormal(TextureLayerDefinition* definition, Renderer* renderer, Vector3 point, Vector3 prenormal, double scale)
-{
-    Vector3 p0, d1, d2, d3, d4, normal;
-    
-    p0 = _getPoint(definition, renderer, point.x, point.z, prenormal, scale);
-    
-    d1 = v3Normalize(v3Sub(_getPoint(definition, renderer, point.x + scale, point.z, prenormal, scale), p0));
-    d3 = v3Normalize(v3Sub(_getPoint(definition, renderer, point.x, point.z + scale, prenormal, scale), p0));
-    if (renderer->render_quality > 5)
-    {
-        d2 = v3Normalize(v3Sub(_getPoint(definition, renderer, point.x - scale, point.z, prenormal, scale), p0));
-        d4 = v3Normalize(v3Sub(_getPoint(definition, renderer, point.x, point.z - scale, prenormal, scale), p0));
-    }
-    
-    normal = v3Cross(d3, d1);
-    if (renderer->render_quality > 5)
-    {
-        normal = v3Add(normal, v3Cross(d1, d4));
-        normal = v3Add(normal, v3Cross(d4, d2));
-        normal = v3Add(normal, v3Cross(d2, d3));
-    }
-
-    return v3Normalize(normal);
-}
-
-double texturesGetLayerCoverage(TextureLayerDefinition* definition, Renderer* renderer, Vector3 location, double detail)
-{
-    Vector3 normal;
-
-    normal = _getPreNormal(definition, renderer, location, detail * 0.1);
-
-    return zoneGetValue(definition->zone, location, normal);
-}
-
 Color texturesGetLayerColor(TextureLayerDefinition* definition, Renderer* renderer, Vector3 location, double detail)
 {
     Color result;
     Vector3 normal;
-    double coverage;
+    double coverage, noise;
 
     result = COLOR_TRANSPARENT;
-    normal = _getPreNormal(definition, renderer, location, detail * 0.1);
+    /*normal = _getPreNormal(definition, renderer, location, detail * 0.1);
 
     coverage = zoneGetValue(definition->zone, location, normal);
     if (coverage > 0.0)
     {
-        normal = _getPostNormal(definition, renderer, location, normal, detail * 0.1);
-        result = renderer->applyLightingToSurface(renderer, location, normal, definition->material);
-        result.a = coverage;
-    }
+        if (coverage < 1.0)
+        {
+            noise = noiseGet2DTotal(definition->border_noise, location.x * 1000.0, location.z * 1000.0);
+            coverage = -1.0 + 2.0 * coverage + noise * (1.0 - coverage);
+        }
+        if (coverage > 0.0)
+        {
+            normal = _getPostNormal(definition, renderer, location, normal, detail * 0.1);
+            result = renderer->applyLightingToSurface(renderer, location, normal, definition->material);
+            result.a = coverage < 0.1 ? coverage / 0.1 : 1.0;
+        }
+    }*/
     return result;
 }
 
-Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, Vector3 location, double detail)
+
+
+static inline Vector3 _getNormal4(Vector3 center, Vector3 north, Vector3 east, Vector3 south, Vector3 west)
 {
-    Color result, tex_color;
+    Vector3 dnorth, deast, dsouth, dwest, normal;
+    
+    dnorth = v3Sub(north, center);
+    deast = v3Sub(east, center);
+    dsouth = v3Sub(south, center);
+    dwest = v3Sub(west, center);
+    
+    normal = v3Cross(deast, dnorth);
+    normal = v3Add(normal, v3Cross(dsouth, deast));
+    normal = v3Add(normal, v3Cross(dwest, dsouth));
+    normal = v3Add(normal, v3Cross(dnorth, dwest));
+    
+    return v3Normalize(normal);
+}
+
+static inline Vector3 _getNormal2(Vector3 center, Vector3 east, Vector3 south)
+{
+    return v3Normalize(v3Cross(v3Sub(south, center), v3Sub(east, center)));
+}
+
+static inline TextureResult _getTerrainResult(Renderer* renderer, double x, double z, double detail)
+{
+    TextureResult result;
+    Vector3 center, north, east, south, west;
+    
+    /* TODO This method is better suited in terrain.c */
+
+    center.x = x;
+    center.z = z;
+    center.y = renderer->getTerrainHeight(renderer, center.x, center.z);
+
+    east.x = x + detail;
+    east.z = z;
+    east.y = renderer->getTerrainHeight(renderer, east.x, east.z);
+
+    south.x = x;
+    south.z = z + detail;
+    south.y = renderer->getTerrainHeight(renderer, south.x, south.z);
+
+    if (renderer->render_quality > 5)
+    {
+        west.x = x - detail;
+        west.z = z;
+        west.y = renderer->getTerrainHeight(renderer, west.x, west.z);
+
+        north.x = x;
+        north.z = z - detail;
+        north.y = renderer->getTerrainHeight(renderer, north.x, north.z);
+
+        result.normal = _getNormal4(center, north, east, south, west);
+    }
+    else
+    {
+        result.normal = _getNormal2(center, east, south);
+    }
+
+    result.location = center;
+    result.color = COLOR_GREEN;
+    result.thickness = -100.0;
+    
+    return result;
+}
+
+static inline void _getLayerThickness(TextureLayerDefinition* definition, Renderer* renderer, double x, double z, TextureResult* result)
+{
+    TextureResult base;
+    double coverage;
+
+    base = _getTerrainResult(renderer, x, z, definition->slope_range);
+    coverage = zoneGetValue(definition->zone, base.location, base.normal);
+    if (coverage > 0.0)
+    {
+        result->thickness = coverage * definition->thickness;
+        result->thickness += noiseGet2DTotal(definition->bump_noise, base.location.x / definition->bump_scaling, base.location.z / definition->bump_scaling) * definition->bump_height;
+
+        result->location = v3Add(base.location, v3Scale(base.normal, result->thickness));
+    }
+    else
+    {
+        result->thickness = -1000.0;
+        result->location = base.location;
+    }
+}
+
+static inline TextureResult _getLayerResult(TextureLayerDefinition* definition, Renderer* renderer, double x, double z, double detail)
+{
+    TextureResult result_center, result_north, result_east, result_south, result_west;
+    
+    _getLayerThickness(definition, renderer, x, z, &result_center);
+    _getLayerThickness(definition, renderer, x + detail, z, &result_east);
+    _getLayerThickness(definition, renderer, x, z + detail, &result_south);
+    
+    if (renderer->render_quality > 5)
+    {
+        _getLayerThickness(definition, renderer, x - detail, z, &result_west);
+        _getLayerThickness(definition, renderer, x, z - detail, &result_north);
+        
+        result_center.normal = _getNormal4(result_center.location, result_north.location, result_east.location, result_south.location, result_west.location);
+    }
+    else
+    {
+        result_center.normal = _getNormal2(result_center.location, result_east.location, result_south.location);
+    }
+    
+    result_center.color = renderer->applyLightingToSurface(renderer, result_center.location, result_center.normal, definition->material);
+    
+    return result_center;
+}
+
+static int _cmpResults(const void* result1, const void* result2)
+{
+    return ((TextureResult*)result1)->thickness > ((TextureResult*)result2)->thickness;
+}
+
+double texturesGetLayerCoverage(TextureLayerDefinition* definition, Renderer* renderer, Vector3 location, double detail)
+{
+    TextureResult base = _getTerrainResult(renderer, location.x, location.z, definition->slope_range);
+    return zoneGetValue(definition->zone, base.location, base.normal);
+}
+
+Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, double x, double z, double detail)
+{
+    TextureResult results[TEXTURES_MAX_LAYERS + 1];
+    Color result;
     int i;
 
-    result = COLOR_GREEN;
+    /* TODO Do not compute layers fully covered */
+    /* TODO Optimize : each layer computes the same shadows */
+    
+    detail *= 0.1;
+    
+    results[0] = _getTerrainResult(renderer, x, z, detail);
+
     for (i = 0; i < definition->nbtextures; i++)
     {
-        /* TODO Do not compute layers fully covered */
-        /* TODO Optimize : each layer computes the same shadows */
-        tex_color = texturesGetLayerColor(definition->textures + i, renderer, location, detail);
-        if (tex_color.a > 0.0001)
-        {
-            colorMask(&result, &tex_color);
-        }
+        results[i + 1] = _getLayerResult(definition->textures + i, renderer, x, z, detail);
+    }
+    
+    qsort(results, definition->nbtextures + 1, sizeof(TextureResult), _cmpResults);
+
+    result = results[0].color;
+    for (i = 0; i < definition->nbtextures; i++)
+    {
+        colorMask(&result, &results[i + 1].color);
     }
 
     return result;

lib_paysages/textures.h

@@ -20,6 +20,8 @@ typedef struct
     double bump_scaling;
     double bump_height;
     SurfaceMaterial material;
+    double thickness;
+    double slope_range;
 } TextureLayerDefinition;
 
 typedef struct
@@ -28,6 +30,14 @@ typedef struct
     TextureLayerDefinition textures[TEXTURES_MAX_LAYERS];
 } TexturesDefinition;
 
+typedef struct
+{
+    Vector3 location;
+    Vector3 normal;
+    double thickness;
+    Color color;
+} TextureResult;
+
 void texturesInit();
 void texturesQuit();
 void texturesSave(PackStream* stream, TexturesDefinition* definition);
@@ -50,7 +60,7 @@ void texturesDeleteLayer(TexturesDefinition* definition, int layer);
 
 double texturesGetLayerCoverage(TextureLayerDefinition* definition, Renderer* renderer, Vector3 location, double detail);
 Color texturesGetLayerColor(TextureLayerDefinition* definition, Renderer* renderer, Vector3 location, double detail);
-Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, Vector3 location, double detail);
+Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, double x, double z, double detail);
 
 #ifdef __cplusplus
 }