Michaël Lemaire
b6555f822c
git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@360 b1fd45b6-86a6-48da-8261-f70d1f35bdcc
382 lines
13 KiB
C
382 lines
13 KiB
C
#include "sky.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
|
|
#include "shared/types.h"
|
|
#include "color.h"
|
|
#include "clouds.h"
|
|
#include "euclid.h"
|
|
#include "lighting.h"
|
|
#include "render.h"
|
|
#include "tools.h"
|
|
#include "preetham.h"
|
|
#include "rayleigh.h"
|
|
|
|
#define SPHERE_SIZE 1000.0
|
|
|
|
/******************************** Configuration ********************************/
|
|
void skyInit()
|
|
{
|
|
}
|
|
|
|
void skyQuit()
|
|
{
|
|
}
|
|
|
|
void skySave(PackStream* stream, SkyDefinition* definition)
|
|
{
|
|
packWriteInt(stream, (int*)&definition->model);
|
|
packWriteDouble(stream, &definition->daytime);
|
|
colorSave(stream, &definition->sun_color);
|
|
packWriteDouble(stream, &definition->sun_radius);
|
|
packWriteDouble(stream, &definition->sun_halo_size);
|
|
curveSave(stream, definition->sun_halo_profile);
|
|
packWriteDouble(stream, &definition->dome_lighting);
|
|
|
|
packWriteInt(stream, &definition->model_custom.auto_from_daytime);
|
|
colorSave(stream, &definition->model_custom.zenith_color);
|
|
colorSave(stream, &definition->model_custom.haze_color);
|
|
packWriteDouble(stream, &definition->model_custom.haze_height);
|
|
packWriteDouble(stream, &definition->model_custom.haze_smoothing);
|
|
|
|
packWriteDouble(stream, &definition->model_preetham.turbidity);
|
|
}
|
|
|
|
void skyLoad(PackStream* stream, SkyDefinition* definition)
|
|
{
|
|
packReadInt(stream, (int*)&definition->model);
|
|
packReadDouble(stream, &definition->daytime);
|
|
colorLoad(stream, &definition->sun_color);
|
|
packReadDouble(stream, &definition->sun_radius);
|
|
packReadDouble(stream, &definition->sun_halo_size);
|
|
curveLoad(stream, definition->sun_halo_profile);
|
|
packReadDouble(stream, &definition->dome_lighting);
|
|
|
|
packReadInt(stream, &definition->model_custom.auto_from_daytime);
|
|
colorLoad(stream, &definition->model_custom.zenith_color);
|
|
colorLoad(stream, &definition->model_custom.haze_color);
|
|
packReadDouble(stream, &definition->model_custom.haze_height);
|
|
packReadDouble(stream, &definition->model_custom.haze_smoothing);
|
|
|
|
packReadDouble(stream, &definition->model_preetham.turbidity);
|
|
|
|
skyValidateDefinition(definition);
|
|
}
|
|
|
|
SkyDefinition skyCreateDefinition()
|
|
{
|
|
SkyDefinition def;
|
|
|
|
def.model = SKY_MODEL_CUSTOM;
|
|
def.daytime = 0.0;
|
|
def.sun_color = COLOR_BLACK;
|
|
def.sun_radius = 1.0;
|
|
def.sun_halo_size = 0.0;
|
|
def.sun_halo_profile = curveCreate();
|
|
def.dome_lighting = 0.0;
|
|
def.model_custom.auto_from_daytime = 0;
|
|
def.model_custom.zenith_color = COLOR_BLACK;
|
|
def.model_custom.haze_color = COLOR_BLACK;
|
|
def.model_custom.haze_height = 0.0;
|
|
def.model_custom.haze_smoothing = 0.0;
|
|
def.model_custom._sky_gradation = colorGradationCreate();
|
|
def.model_preetham.turbidity = 0.0;
|
|
|
|
skyValidateDefinition(&def);
|
|
|
|
return def;
|
|
}
|
|
|
|
void skyDeleteDefinition(SkyDefinition* definition)
|
|
{
|
|
curveDelete(definition->sun_halo_profile);
|
|
colorGradationDelete(definition->model_custom._sky_gradation);
|
|
}
|
|
|
|
void skyCopyDefinition(SkyDefinition* source, SkyDefinition* destination)
|
|
{
|
|
destination->model = source->model;
|
|
destination->daytime = source->daytime;
|
|
destination->sun_color = source->sun_color;
|
|
destination->sun_radius = source->sun_radius;
|
|
destination->sun_halo_size = source->sun_halo_size;
|
|
destination->dome_lighting = source->dome_lighting;
|
|
destination->model_custom.auto_from_daytime = source->model_custom.auto_from_daytime;
|
|
destination->model_custom.zenith_color = source->model_custom.zenith_color;
|
|
destination->model_custom.haze_color = source->model_custom.haze_color;
|
|
destination->model_custom.haze_height = source->model_custom.haze_height;
|
|
destination->model_custom.haze_smoothing = source->model_custom.haze_smoothing;
|
|
destination->model_preetham.turbidity = source->model_preetham.turbidity;
|
|
|
|
curveCopy(source->sun_halo_profile, destination->sun_halo_profile);
|
|
|
|
skyValidateDefinition(destination);
|
|
}
|
|
|
|
static void _setAutoCustomModel(SkyDefinition* definition)
|
|
{
|
|
ColorGradation* zenith_gradation;
|
|
ColorGradation* haze_gradation;
|
|
|
|
zenith_gradation = colorGradationCreate();
|
|
haze_gradation = colorGradationCreate();
|
|
|
|
colorGradationQuickAddRgb(zenith_gradation, 0.2, 0.03, 0.03, 0.05);
|
|
colorGradationQuickAddRgb(zenith_gradation, 0.25, 0.25, 0.33, 0.37);
|
|
colorGradationQuickAddRgb(zenith_gradation, 0.35, 0.52, 0.63, 0.8);
|
|
colorGradationQuickAddRgb(zenith_gradation, 0.65, 0.52, 0.63, 0.8);
|
|
colorGradationQuickAddRgb(zenith_gradation, 0.75, 0.25, 0.33, 0.37);
|
|
colorGradationQuickAddRgb(zenith_gradation, 0.8, 0.03, 0.03, 0.05);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.2, 0.05, 0.05, 0.08);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.25, 0.55, 0.42, 0.42);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.3, 0.6, 0.6, 0.6);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.4, 0.92, 0.93, 1.0);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.6, 0.92, 0.93, 1.0);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.7, 0.6, 0.6, 0.8);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.75, 0.62, 0.50, 0.42);
|
|
colorGradationQuickAddRgb(haze_gradation, 0.8, 0.05, 0.05, 0.08);
|
|
|
|
definition->model_custom.zenith_color = colorGradationGet(zenith_gradation, definition->daytime);
|
|
definition->model_custom.haze_color = colorGradationGet(haze_gradation, definition->daytime);
|
|
|
|
colorGradationDelete(zenith_gradation);
|
|
colorGradationDelete(haze_gradation);
|
|
}
|
|
|
|
void skyValidateDefinition(SkyDefinition* definition)
|
|
{
|
|
if (definition->model == SKY_MODEL_CUSTOM)
|
|
{
|
|
if (definition->model_custom.auto_from_daytime)
|
|
{
|
|
_setAutoCustomModel(definition);
|
|
}
|
|
colorGradationClear(definition->model_custom._sky_gradation);
|
|
colorGradationQuickAdd(definition->model_custom._sky_gradation, 0.0, &definition->model_custom.haze_color);
|
|
colorGradationQuickAdd(definition->model_custom._sky_gradation, definition->model_custom.haze_height - definition->model_custom.haze_smoothing, &definition->model_custom.haze_color);
|
|
colorGradationQuickAdd(definition->model_custom._sky_gradation, definition->model_custom.haze_height, &definition->model_custom.zenith_color);
|
|
colorGradationQuickAdd(definition->model_custom._sky_gradation, 1.0, &definition->model_custom.zenith_color);
|
|
}
|
|
}
|
|
|
|
static inline void _addDomeLight(SkyDefinition* sky, Renderer* renderer, LightDefinition* light, Vector3 direction, double factor)
|
|
{
|
|
light->direction = v3Scale(direction, -1.0);
|
|
light->color = skyGetColor(sky, renderer, VECTOR_ZERO, direction);
|
|
light->color.r *= factor;
|
|
light->color.g *= factor;
|
|
light->color.b *= factor;
|
|
light->reflection = 0.0;
|
|
light->filtered = 0;
|
|
light->masked = 0;
|
|
}
|
|
|
|
int skyGetLights(SkyDefinition* sky, Renderer* renderer, LightDefinition* lights, int max_lights)
|
|
{
|
|
double sun_angle;
|
|
Vector3 sun_direction;
|
|
int nblights = 0;
|
|
|
|
sun_angle = (sky->daytime + 0.75) * M_PI * 2.0;
|
|
sun_direction.x = cos(sun_angle);
|
|
sun_direction.y = sin(sun_angle);
|
|
sun_direction.z = 0.0;
|
|
|
|
/* TODO Moon light */
|
|
|
|
if (max_lights > 0)
|
|
{
|
|
/* Direct light from the sun */
|
|
lights[0].direction = v3Scale(sun_direction, -1.0);
|
|
lights[0].color = sky->sun_color;
|
|
lights[0].reflection = 1.0;
|
|
lights[0].filtered = 1;
|
|
lights[0].masked = 1;
|
|
nblights = 1;
|
|
max_lights--;
|
|
}
|
|
|
|
if (max_lights > 0)
|
|
{
|
|
/* Indirect lighting by skydome scattering */
|
|
int xsamples, ysamples, samples, x, y;
|
|
double xstep, ystep, factor;
|
|
Vector3 direction;
|
|
|
|
samples = (renderer->render_quality < 5) ? 9 : (renderer->render_quality * 4 + 1);
|
|
samples = samples > max_lights ? max_lights : samples;
|
|
|
|
factor = sky->dome_lighting / (double)samples;
|
|
|
|
_addDomeLight(sky, renderer, lights + nblights, VECTOR_UP, factor);
|
|
nblights++;
|
|
samples--;
|
|
|
|
if (samples >= 2)
|
|
{
|
|
xsamples = samples / 2;
|
|
ysamples = samples / xsamples;
|
|
|
|
xstep = M_PI * 2.0 / (double)xsamples;
|
|
ystep = M_PI * 0.5 / (double)ysamples;
|
|
|
|
for (x = 0; x < xsamples; x++)
|
|
{
|
|
for (y = 0; y < ysamples; y++)
|
|
{
|
|
direction.x = cos(x * xstep) * cos(y * ystep);
|
|
direction.y = -sin(y * ystep);
|
|
direction.z = sin(x * xstep) * cos(y * ystep);
|
|
|
|
_addDomeLight(sky, renderer, lights + nblights, direction, factor);
|
|
nblights++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return nblights;
|
|
}
|
|
|
|
/******************************** Rendering ********************************/
|
|
Color skyGetColor(SkyDefinition* definition, Renderer* renderer, Vector3 eye, Vector3 look)
|
|
{
|
|
double dist;
|
|
Vector3 sun_position;
|
|
Color sun_color, sky_color;
|
|
|
|
sun_position = skyGetSunDirection(definition);
|
|
|
|
look = v3Normalize(look);
|
|
dist = v3Norm(v3Sub(look, sun_position));
|
|
|
|
if (definition->model == SKY_MODEL_PREETHAM)
|
|
{
|
|
sky_color = preethamGetSkyColor(eye, look, sun_position, definition->model_preetham.turbidity);
|
|
}
|
|
else if (definition->model == SKY_MODEL_RAYLEIGH_MIE)
|
|
{
|
|
sky_color = rayleighGetSkyColor(eye, look, sun_position);
|
|
}
|
|
else
|
|
{
|
|
sky_color = colorGradationGet(definition->model_custom._sky_gradation, look.y * 0.5 + 0.5);
|
|
}
|
|
|
|
if (dist < definition->sun_radius + definition->sun_halo_size)
|
|
{
|
|
sun_color = definition->sun_color;
|
|
if (dist <= definition->sun_radius)
|
|
{
|
|
return sun_color;
|
|
}
|
|
else
|
|
{
|
|
dist = (dist - definition->sun_radius) / definition->sun_halo_size;
|
|
sun_color.a = curveGetValue(definition->sun_halo_profile, dist);
|
|
colorMask(&sky_color, &sun_color);
|
|
return sky_color;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return sky_color;
|
|
}
|
|
}
|
|
|
|
static Color _postProcessFragment(Renderer* renderer, Vector3 location, void* data)
|
|
{
|
|
Vector3 direction;
|
|
Color result;
|
|
SkyDefinition* definition;
|
|
|
|
definition = (SkyDefinition*)data;
|
|
|
|
direction = v3Sub(location, renderer->camera_location);
|
|
|
|
result = skyGetColor(definition, renderer, renderer->camera_location, v3Normalize(direction));
|
|
result = renderer->applyClouds(renderer, result, renderer->camera_location, v3Add(renderer->camera_location, v3Scale(direction, 10.0)));
|
|
|
|
return result;
|
|
}
|
|
|
|
void skyRender(SkyDefinition* definition, Renderer* renderer)
|
|
{
|
|
int res_i, res_j;
|
|
int i, j;
|
|
double step_i, step_j;
|
|
double current_i, current_j;
|
|
Vector3 vertex1, vertex2, vertex3, vertex4;
|
|
Vector3 direction;
|
|
|
|
res_i = renderer->render_quality * 40;
|
|
res_j = renderer->render_quality * 20;
|
|
step_i = M_PI * 2.0 / (double)res_i;
|
|
step_j = M_PI / (double)res_j;
|
|
|
|
for (j = 0; j < res_j; j++)
|
|
{
|
|
if (!renderer->addRenderProgress(renderer, 0.0))
|
|
{
|
|
return;
|
|
}
|
|
|
|
current_j = (double)(j - res_j / 2) * step_j;
|
|
|
|
for (i = 0; i < res_i; i++)
|
|
{
|
|
current_i = (double)i * step_i;
|
|
|
|
direction.x = SPHERE_SIZE * cos(current_i) * cos(current_j);
|
|
direction.y = SPHERE_SIZE * sin(current_j);
|
|
direction.z = SPHERE_SIZE * sin(current_i) * cos(current_j);
|
|
vertex1 = v3Add(renderer->camera_location, direction);
|
|
|
|
direction.x = SPHERE_SIZE * cos(current_i + step_i) * cos(current_j);
|
|
direction.y = SPHERE_SIZE * sin(current_j);
|
|
direction.z = SPHERE_SIZE * sin(current_i + step_i) * cos(current_j);
|
|
vertex2 = v3Add(renderer->camera_location, direction);
|
|
|
|
direction.x = SPHERE_SIZE * cos(current_i + step_i) * cos(current_j + step_j);
|
|
direction.y = SPHERE_SIZE * sin(current_j + step_j);
|
|
direction.z = SPHERE_SIZE * sin(current_i + step_i) * cos(current_j + step_j);
|
|
vertex3 = v3Add(renderer->camera_location, direction);
|
|
|
|
direction.x = SPHERE_SIZE * cos(current_i) * cos(current_j + step_j);
|
|
direction.y = SPHERE_SIZE * sin(current_j + step_j);
|
|
direction.z = SPHERE_SIZE * sin(current_i) * cos(current_j + step_j);
|
|
vertex4 = v3Add(renderer->camera_location, direction);
|
|
|
|
/* TODO Triangles at poles */
|
|
renderer->pushQuad(renderer, vertex1, vertex4, vertex3, vertex2, _postProcessFragment, definition);
|
|
}
|
|
}
|
|
}
|
|
|
|
Vector3 skyGetSunDirection(SkyDefinition* definition)
|
|
{
|
|
Vector3 result;
|
|
double sun_angle = (definition->daytime + 0.75) * M_PI * 2.0;
|
|
result.x = cos(sun_angle);
|
|
result.y = sin(sun_angle);
|
|
result.z = 0.0;
|
|
return result;
|
|
}
|
|
|
|
Color skyGetSunColor(SkyDefinition* definition)
|
|
{
|
|
return definition->sun_color;
|
|
}
|
|
|
|
Color skyGetZenithColor(SkyDefinition* definition)
|
|
{
|
|
Vector3 look = {0.0, 1.0, 0.0};
|
|
return skyGetColor(definition, NULL, VECTOR_ZERO, look);
|
|
}
|
|
|
|
Color skyGetHorizonColor(SkyDefinition* definition)
|
|
{
|
|
Vector3 look = {0.0, 0.0, 1.0};
|
|
return skyGetColor(definition, NULL, VECTOR_ZERO, look);
|
|
}
|