#ifndef _PAYSAGES_FUNCTIONS_H_
#define _PAYSAGES_FUNCTIONS_H_

#include "types.h"
#include <stdio.h>

#ifdef __cplusplus
extern "C" {
#endif

void paysagesInit();

/* array.c */
void arrayCreate(Array* array, int item_size);
void arrayDelete(Array* array);
void* arrayAppend(Array* array, void* item);
void arrayInsert(Array* array, void* item, int position);
void arrayReplace(Array* array, void* item, int position);
void arrayLStrip(Array* array, int count);
void arrayClear(Array* array);

/* auto.c */
void autoInit();
void autoSave(char* filepath);
void autoLoad(char* filepath);
void autoSetDaytime(int hour, int minute);
void autoSetDaytimeFraction(double daytime);
void autoSetRenderQuality(int quality);
void autoGenRealisticLandscape(int seed);
void autoRenderSceneTwoPass();
void autoRenderSceneRayTracing();

/* camera.c */
void cameraSave(FILE* f);
void cameraLoad(FILE* f);
void cameraSetLocation(double x, double y, double z);
void cameraSetTarget(double x, double y, double z);
void cameraSetAngle(double angle);
Vector3 cameraProject(Vector3 point);
Vector3 cameraUnproject(Vector3 point);
void cameraProjectToFragment(double x, double y, double z, RenderFragment* result);
void cameraPushOverlay(Color col, f_RenderFragmentCallback callback);

/* color.c */
void colorSave(Color col, FILE* f);
Color colorLoad(FILE* f);
unsigned int colorTo32BitRGBA(Color* col);
unsigned int colorTo32BitBGRA(Color* col);
unsigned int colorTo32BitARGB(Color* col);
unsigned int colorTo32BitABGR(Color* col);
void colorMask(Color* base, Color* mask);
double colorNormalize(Color* col);
double colorGetValue(Color* col);
ColorGradation colorGradationCreate();
void colorGradationAdd(ColorGradation* gradation, double value, Color* col);
void colorGradationAddRgba(ColorGradation* gradation, double value, double r, double g, double b, double a);
Color colorGradationGet(ColorGradation* gradation, double value);
void colorGradationSave(FILE* f, ColorGradation gradation);
ColorGradation colorGradationLoad(FILE* f);

/* euclid.c */
void v3Save(Vector3 v, FILE* f);
Vector3 v3Load(FILE* f);
void m4Save(Matrix4 m, FILE* f);
Matrix4 m4Load(FILE* f);
Vector3 v3Translate(Vector3 v1, double x, double y, double z);
Vector3 v3Add(Vector3 v1, Vector3 v2);
Vector3 v3Sub(Vector3 v1, Vector3 v2);
Vector3 v3Neg(Vector3 v);
Vector3 v3Scale(Vector3 v, double scale);
double v3Norm(Vector3 v);
Vector3 v3Normalize(Vector3 v);
double v3Dot(Vector3 v1, Vector3 v2);
Vector3 v3Cross(Vector3 v1, Vector3 v2);
Matrix4 m4NewIdentity();
Matrix4 m4Mult(Matrix4 m1, Matrix4 m2);
Vector3 m4MultPoint(Matrix4 m, Vector3 v);
Vector3 m4Transform(Matrix4 m, Vector3 v);
Matrix4 m4Transpose(Matrix4 m);
Matrix4 m4NewScale(double x, double y, double z);
Matrix4 m4NewTranslate(double x, double y, double z);
Matrix4 m4NewRotateX(double angle);
Matrix4 m4NewRotateY(double angle);
Matrix4 m4NewRotateZ(double angle);
Matrix4 m4NewRotateAxis(double angle, Vector3 axis);
Matrix4 m4NewRotateEuler(double heading, double attitude, double bank);
Matrix4 m4NewRotateTripleAxis(Vector3 x, Vector3 y, Vector3 z);
Matrix4 m4NewLookAt(Vector3 eye, Vector3 at, Vector3 up);
Matrix4 m4NewPerspective(double fov_y, double aspect, double near, double far);
double m4Determinant(Matrix4 m);
Matrix4 m4Inverse(Matrix4 m);

/* fog.c */
void fogSave(FILE* f);
void fogLoad(FILE* f);
void fogSetColor(Color col);
void fogSetDistance(double near, double far);
Color fogApplyToLocation(Vector3 location, Color base);

/* lighting.c */
void lightingSave(FILE* f);
void lightingLoad(FILE* f);
void lightingSetSunDirection(double x, double y, double z);
void lightingSetSunAngle(double hor, double ver);
void lightingSetSunColor(Color col);
Color lightingApply(Vector3 location, Vector3 normal, double shadowing, Color base, double reflection, double shininess);

/* modifiers.c */
HeightModifier* modifierCreate();
void modifierDelete(HeightModifier* modifier);
void modifierSave(HeightModifier* zone, FILE* f);
void modifierLoad(HeightModifier* zone, FILE* f);
Zone* modifierGetZone(HeightModifier* modifier);
void modifierActionAddValue(HeightModifier* modifier, double value);
void modifierActionFixValue(HeightModifier* modifier, double value);
Vector3 modifierApply(HeightModifier* modifier, Vector3 location);

/* noise.c */
NoiseGenerator* noiseCreateGenerator();
void noiseDeleteGenerator(NoiseGenerator* generator);
void noiseSave(NoiseGenerator* perlin, FILE* f);
void noiseLoad(NoiseGenerator* perlin, FILE* f);
void noiseCopy(NoiseGenerator* source, NoiseGenerator* destination);
void noiseGenerateBaseNoise(NoiseGenerator* generator, int size);
int noiseGetBaseSize(NoiseGenerator* generator);
double noiseGetMaxValue(NoiseGenerator* generator);
int noiseGetLevelCount(NoiseGenerator* generator);
void noiseClearLevels(NoiseGenerator* generator);
void noiseAddLevel(NoiseGenerator* generator, NoiseLevel level);
void noiseAddLevelSimple(NoiseGenerator* generator, double scaling, double height);
void noiseAddLevels(NoiseGenerator* generator, int level_count, NoiseLevel start_level, double scaling_factor, double height_factor, int randomize_offset);
void noiseAddLevelsSimple(NoiseGenerator* generator, int level_count, double scaling, double height);
int noiseGetLevel(NoiseGenerator* generator, int level, NoiseLevel* params);
void noiseSetLevel(NoiseGenerator* generator, int level, NoiseLevel params);
void noiseSetLevelSimple(NoiseGenerator* generator, int level, double scaling, double height);
void noiseNormalizeHeight(NoiseGenerator* generator, double min_height, double max_height, int adjust_scaling);
double noiseGet1DLevel(NoiseGenerator* generator, int level, double x);
double noiseGet1DTotal(NoiseGenerator* generator, double x);
double noiseGet1DDetail(NoiseGenerator* generator, double x, double detail);
double noiseGet2DLevel(NoiseGenerator* generator, int level, double x, double y);
double noiseGet2DTotal(NoiseGenerator* generator, double x, double y);
double noiseGet2DDetail(NoiseGenerator* generator, double x, double y, double detail);
double noiseGet3DLevel(NoiseGenerator* generator, int level, double x, double y, double z);
double noiseGet3DTotal(NoiseGenerator* generator, double x, double y, double z);
double noiseGet3DDetail(NoiseGenerator* generator, double x, double y, double z, double detail);

/* render.c */
void renderSave(FILE* f);
void renderLoad(FILE* f);
void renderSetSize(int width, int height);
void renderSetQuality(int quality);
void renderClear();
void renderUpdate();
void renderInterrupt();
void renderSetBackgroundColor(Color* col);
double renderGetPrecision(Vector3 location);
void renderAddFragment(RenderFragment* fragment);
void renderPushFragment(int x, int y, double z, Vertex* vertex);
void renderPushTriangle(Vertex* v1, Vertex* v2, Vertex* v3);
void renderPushQuad(Vertex* v1, Vertex* v2, Vertex* v3, Vertex* v4);
void renderPostProcess(int nbchunks);
void renderSaveToFile(const char* path);
void renderSetPreviewCallbacks(PreviewCallbackResize resize, PreviewCallbackClear clear, PreviewCallbackDraw draw, PreviewCallbackUpdate update);
int renderSetNextProgressStep(double start, double end);
int renderTellProgress(double progress);

/* sky.c */
void skySave(FILE* f);
void skyLoad(FILE* f);
Color skyGetColor(Vector3 start, Vector3 direction);
Color skyProjectRay(Vector3 start, Vector3 direction);
void skySetGradation(ColorGradation grad);
void skyRender(RenderProgressCallback callback);

/* terrain.c */
void terrainSave(FILE* f);
void terrainLoad(FILE* f);
void terrainInit();
NoiseGenerator* terrainGetNoiseGenerator();
void terrainSetNoiseGenerator(NoiseGenerator* generator);
void terrainAddTexture(Texture* tex, double subsurf_scale, Zone* zone, double border_scaling);
void terrainAddModifier(HeightModifier* modifier);
double terrainGetHeight(double x, double z);
double terrainGetHeightNormalized(double x, double z);
Color terrainGetColor(double x, double z, double precision);
double terrainGetShadow(Vector3 start, Vector3 direction);
int terrainProjectRay(Vector3 start, Vector3 direction, Vector3* hit_point, Color* hit_color);
void terrainSetChunkSize(double min_size, double visible_size);
void terrainRender(RenderProgressCallback callback);

/* textures.c */
void texturesSave(FILE* f);
void texturesLoad(FILE* f);
Texture* textureCreateFromFile(const char* filename);
Color textureApply(Texture* tex, Vector3 location, Vector3 normal);

/* tools.c */
double toolsRandom();
double toolsBicubicInterpolate(double stencil[16], double x, double y);
void toolsFloat2DMapCopy(double* src, double* dest, int src_xstart, int src_ystart, int dest_xstart, int dest_ystart, int xsize, int ysize, int src_xstep, int src_ystep, int dest_xstep, int dest_ystep);
Vector3 toolsGetNormalFromTriangle(Vector3 center, Vector3 bottom, Vector3 right);
void toolsSaveDouble(FILE* f, double value);
double toolsLoadDouble(FILE* f);
void toolsSaveInt(FILE* f, int value);
int toolsLoadInt(FILE* f);

/* zone.c */
Zone* zoneCreate();
void zoneDelete(Zone* zone);
void zoneSave(Zone* zone, FILE* f);
void zoneLoad(Zone* zone, FILE* f);
void zoneIncludeCircleArea(Zone* zone, double value, double centerx, double centerz, double softradius, double hardradius);
void zoneExcludeCircleArea(Zone* zone, double centerx, double centerz, double softradius, double hardradius);
void zoneAddHeightRange(Zone* zone, double value, double hardmin, double softmin, double softmax, double hardmax);
void zoneAddSteepnessRange(Zone* zone, double value, double hardmin, double softmin, double softmax, double hardmax);
double zoneGetValue(Zone* zone, Vector3 location, Vector3 normal);

#ifdef __cplusplus
}
#endif

#endif