Subversion Repositories Games.Carmageddon

#include "depth.h"

#include "brender/brender.h"

#include "displays.h"

#include "errors.h"

#include "globvars.h"

#include "globvrkm.h"

#include "globvrpb.h"

#include "harness/hooks.h"

#include "harness/trace.h"

#include "pd/sys.h"

#include "replay.h"

#include "spark.h"

#include "trig.h"

#include "utility.h"

#include "world.h"

#include <math.h>

#include <stdlib.h>

tDepth_effect gDistance_depth_effects[4];

int gSky_on;

int gDepth_cueing_on;

tDepth_effect_type gSwap_depth_effect_type;

br_scalar gSky_height;

br_scalar gSky_x_multiplier;

br_scalar gSky_width;

br_scalar gSky_y_multiplier;

tU32 gLast_depth_change;

br_scalar gOld_yon;

br_pixelmap* gWater_shade_table;

br_material* gHorizon_material;

br_model* gRearview_sky_model;

int gFog_shade_table_power;

br_actor* gRearview_sky_actor;

int gAcid_shade_table_power;

int gWater_shade_table_power;

br_model* gForward_sky_model;

br_actor* gForward_sky_actor;

int gDepth_shade_table_power;

br_pixelmap* gFog_shade_table;

int gSwap_depth_effect_start;

br_pixelmap* gDepth_shade_table;

tSpecial_volume* gLast_camera_special_volume;

br_pixelmap* gAcid_shade_table;

int gSwap_depth_effect_end;

br_pixelmap* gSwap_sky_texture;

br_angle gOld_fov;

br_angle gSky_image_width;

br_angle gSky_image_height;

br_angle gSky_image_underground;

// IDA: int __usercall Log2@<EAX>(int pNumber@<EAX>)

int Log2(int pNumber) {

    int i;

    int bits[16];

    LOG_TRACE("(%d)", pNumber);

    bits[0] = 1;

    bits[1] = 2;

    bits[2] = 4;

    bits[3] = 8;

    bits[4] = 16;

    bits[5] = 32;

    bits[6] = 64;

    bits[7] = 128;

    bits[8] = 256;

    bits[9] = 512;

    bits[10] = 1024;

    bits[11] = 2048;

    bits[12] = 4096;

    bits[13] = 0x2000;

    bits[14] = 0x4000;

    bits[15] = 0x8000;

    for (i = COUNT_OF(bits) - 1; i >= 0; --i) {

        if ((bits[i] & pNumber) != 0) {

            return i;

        }

    }

    return 0;

}

// IDA: br_scalar __cdecl CalculateWrappingMultiplier(br_scalar pValue, br_scalar pYon)

br_scalar CalculateWrappingMultiplier(br_scalar pValue, br_scalar pYon) {

    br_scalar k;

    br_scalar trunc_k;

    int int_k;

    LOG_TRACE("(%f, %f)", pValue, pYon);

    k = pYon * 1.3f * TAU / pValue;

    int_k = (int)k;

    if (k - int_k <= .5f) {

        trunc_k = int_k;

    } else {

        trunc_k = int_k + 1.f;

    }

    return trunc_k / TAU * pValue;

}

// IDA: br_scalar __usercall DepthCueingShiftToDistance@<ST0>(int pShift@<EAX>)

br_scalar DepthCueingShiftToDistance(int pShift) {

    LOG_TRACE("(%d)", pShift);

    NOT_IMPLEMENTED();

}

// IDA: void __usercall FogAccordingToGPSCDE(br_material *pMaterial@<EAX>)

void FogAccordingToGPSCDE(br_material* pMaterial) {

    //int start; // Pierre-Marie Baty -- unused variable

    //int end; // Pierre-Marie Baty -- unused variable

    LOG_TRACE("(%p)", pMaterial);

    NOT_IMPLEMENTED();

}

// IDA: void __cdecl FrobFog()

void FrobFog(void) {

    //int i; // Pierre-Marie Baty -- unused variable

    //br_material* mat; // Pierre-Marie Baty -- unused variable

    LOG_TRACE("()");

    NOT_IMPLEMENTED();

}

// IDA: void __usercall InstantDepthChange(tDepth_effect_type pType@<EAX>, br_pixelmap *pSky_texture@<EDX>, int pStart@<EBX>, int pEnd@<ECX>)

void InstantDepthChange(tDepth_effect_type pType, br_pixelmap* pSky_texture, int pStart, int pEnd) {

    LOG_TRACE("(%d, %p, %d, %d)", pType, pSky_texture, pStart, pEnd);

    if (pType == -1) {

        pStart = 3;

        pEnd = 3;

    }

    gProgram_state.current_depth_effect.sky_texture = pSky_texture;

    gHorizon_material->colour_map = pSky_texture;

    BrMaterialUpdate(gHorizon_material, BR_MATU_ALL);

    gProgram_state.current_depth_effect.type = pType;

    gProgram_state.current_depth_effect.start = pStart;

    gProgram_state.current_depth_effect.end = pEnd;

    gProgram_state.default_depth_effect.type = pType;

    gProgram_state.default_depth_effect.start = pStart;

    gProgram_state.default_depth_effect.end = pEnd;

}

// IDA: br_scalar __cdecl Tan(br_scalar pAngle)

br_scalar Tan(br_scalar pAngle) {

    LOG_TRACE("(%f)", pAngle);

    return sinf(BrAngleToRadian(pAngle)) / cosf(BrAngleToRadian(pAngle));

}

// IDA: br_scalar __usercall EdgeU@<ST0>(br_angle pSky@<EAX>, br_angle pView@<EDX>, br_angle pPerfect@<EBX>)

br_scalar EdgeU(br_angle pSky, br_angle pView, br_angle pPerfect) {

    br_scalar a;

    br_scalar b;

    br_scalar c;

    LOG_TRACE("(%d, %d, %d)", pSky, pView, pPerfect);

    a = cosf(BrAngleToRadian(pPerfect));

    b = sinf(BrAngleToRadian(pView));

    c = cosf(BrAngleToRadian(pView));

    return b * a * a / (BrAngleToRadian(pSky) * (1.f + c));

}

// IDA: void __usercall MungeSkyModel(br_actor *pCamera@<EAX>, br_model *pModel@<EDX>)

void MungeSkyModel(br_actor* pCamera, br_model* pModel) {

    br_camera* camera_data;

    br_scalar horizon_half_height;

    br_scalar horizon_half_width;

    br_scalar horizon_half_diag;

    br_scalar tan_half_fov;

    br_scalar sky_distance;

    //br_angle half_hori_fov; // Pierre-Marie Baty -- unused variable

    br_angle half_diag_fov;

    tU8 nbands;

    tU8 band;

    tU8 vertex;

    tU8 stripe;

    br_scalar edge_u;

    br_scalar narrow_u;

    br_angle min_angle;

    br_angle angle_range;

    br_angle angle;

    LOG_TRACE("(%p, %p)", pCamera, pModel);

    camera_data = pCamera->type_data;

    tan_half_fov = Tan(camera_data->field_of_view / 2);

    sky_distance = camera_data->yon_z - 1.f;

    horizon_half_width = sky_distance * tan_half_fov;

    horizon_half_height = horizon_half_width * camera_data->aspect;

    horizon_half_diag = sqrtf(horizon_half_height * horizon_half_height + horizon_half_width * horizon_half_width);

    half_diag_fov = BrRadianToAngle(atan2f(horizon_half_diag, sky_distance));

    edge_u = EdgeU(gSky_image_width, 2 * half_diag_fov, BR_ANGLE_DEG(10));

    narrow_u = edge_u / 2.f;

    gSky_width = horizon_half_width * 2.f;

    gSky_height = horizon_half_height * 2.f;

    gSky_x_multiplier = CalculateWrappingMultiplier(gSky_width, camera_data->yon_z);

    gSky_y_multiplier = CalculateWrappingMultiplier(gSky_height, camera_data->yon_z);

    for (vertex = 0; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].map.v[0] = -edge_u;

    }

    for (vertex = 1; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].map.v[0] = -narrow_u;

    }

    for (vertex = 2; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].map.v[0] = narrow_u;

    }

    for (vertex = 3; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].map.v[0] = edge_u;

    }

    for (vertex = 0; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].p.v[0] = -horizon_half_diag;

    }

    for (vertex = 1; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].p.v[0] = -(horizon_half_diag / 2.f);

    }

    for (vertex = 2; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].p.v[0] = horizon_half_diag / 2.f;

    }

    for (vertex = 3; vertex < 88; vertex += 4) {

        pModel->vertices[vertex].p.v[0] = horizon_half_diag;

    }

    PossibleService();

    angle_range = -gSky_image_underground - (-BR_ANGLE_DEG(90) - half_diag_fov);

    for (band = 0; band < 2u; band++) {

        vertex = 4 * band;

        angle = -BR_ANGLE_DEG(90) - half_diag_fov + angle_range * band / 2;

        pModel->vertices[vertex].p.v[1] = sinf(BrAngleToRadian(angle)) * sky_distance;

        pModel->vertices[vertex].p.v[2] = -cosf(BrAngleToRadian(angle)) * sky_distance;

    }

    min_angle = -gSky_image_underground;

    angle_range = gSky_image_height;

    nbands = 18;

    for (band = 0; band < nbands; band++) {

        vertex = 4 * band + 8;

        pModel->vertices[vertex].p.v[1] = sinf(BrAngleToRadian(min_angle + angle_range * band / nbands)) * sky_distance;

        pModel->vertices[vertex].p.v[2] = -cosf(BrAngleToRadian(min_angle + angle_range * band / nbands)) * sky_distance;

    }

    min_angle = gSky_image_height - gSky_image_underground;

    angle_range = half_diag_fov + BR_ANGLE_DEG(90) - (gSky_image_height - gSky_image_underground);

    for (band = 0; band <= 1u; band++) {

        vertex = 4 * band + 80;

        angle = min_angle + angle_range * band;

        pModel->vertices[vertex].p.v[1] = sinf(BrAngleToRadian(angle)) * sky_distance;

        pModel->vertices[vertex].p.v[2] = -cosf(BrAngleToRadian(angle)) * sky_distance;

    }

    PossibleService();

    for (band = 0; band <= 21u; ++band) {

        vertex = 4 * band;

        for (stripe = 1; stripe < 4u; ++stripe) {

            pModel->vertices[vertex + stripe].p.v[1] = pModel->vertices[vertex].p.v[1];

            pModel->vertices[vertex + stripe].p.v[2] = pModel->vertices[vertex].p.v[2];

        }

    }

    BrModelUpdate(pModel, BR_MODU_ALL & ~BR_MODU_VERTEX_NORMALS);

}

// IDA: br_model* __usercall CreateHorizonModel@<EAX>(br_actor *pCamera@<EAX>)

br_model* CreateHorizonModel(br_actor* pCamera) {

    //tU8 nbands; // Pierre-Marie Baty -- unused variable

    tU8 band;

    tU8 vertex;

    tU8 stripe;

    br_model* model;

    LOG_TRACE("(%p)", pCamera);

    model = BrModelAllocate(NULL, 88, 126);

    model->flags |= BR_MODF_KEEP_ORIGINAL;

    for (band = 0; band < 21; band++) {

        for (stripe = 0; stripe < 3; stripe++) {

            model->faces[6 * band + 2 * stripe].vertices[0] = stripe + 4 * band + 0;

            model->faces[6 * band + 2 * stripe].vertices[1] = stripe + 4 * band + 1;

            model->faces[6 * band + 2 * stripe].vertices[2] = stripe + 4 * band + 5;

            model->faces[6 * band + 2 * stripe + 1].vertices[0] = stripe + 4 * band + 0;

            model->faces[6 * band + 2 * stripe + 1].vertices[1] = stripe + 4 * band + 5;

            model->faces[6 * band + 2 * stripe + 1].vertices[2] = stripe + 4 * band + 4;

            model->faces[6 * band + 2 * stripe + 0].smoothing = 1;

            model->faces[6 * band + 2 * stripe + 1].smoothing = 1;

            model->faces[6 * band + 2 * stripe + 0].material = NULL;

            model->faces[6 * band + 2 * stripe + 1].material = NULL;

        }

    }

    for (vertex = 0; vertex < 12; vertex++) {

        model->vertices[vertex].map.v[1] = 0.9999999f;

    }

    for (vertex = 80; vertex < 88; vertex++) {

        model->vertices[vertex].map.v[1] = 0.f;

    }

    for (band = 1; band < 18; band++) {

        model->vertices[4 * band + 8].map.v[1] = (float)(18 - band) / 18.f;

        for (stripe = 1; stripe < 4; stripe++) {

            model->vertices[4 * band + 8 + stripe].map.v[1] = model->vertices[4 * band + 8].map.v[1];

        }

    }

    return model;

}

// IDA: void __usercall LoadDepthTable(char *pName@<EAX>, br_pixelmap **pTable@<EDX>, int *pPower@<EBX>)

void LoadDepthTable(char* pName, br_pixelmap** pTable, int* pPower) {

    tPath_name the_path;

    int i;

    int j;

    tU8 temp;

    LOG_TRACE("(\"%s\", %p, %p)", pName, pTable, pPower);

#define PTABLE_PIXEL_AT(X, Y) ((tU8*)((*pTable)->pixels))[(X) + (Y) * (*pTable)->row_bytes]

    PathCat(the_path, gApplication_path, "SHADETAB");

    PathCat(the_path, the_path, pName);

    *pTable = DRPixelmapLoad(the_path);

    if (*pTable == NULL) {

        FatalError(kFatalError_LoadDepthCueShadeTable);

    }

    *pPower = Log2((*pTable)->height);

    for (i = 0; i < (*pTable)->width; i++) {

        for (j = 0; j < (*pTable)->height / 2; j++) {

            temp = PTABLE_PIXEL_AT(i, j);

            PTABLE_PIXEL_AT(i, j) = PTABLE_PIXEL_AT(i, ((*pTable)->height - j - 1));

            PTABLE_PIXEL_AT(i, ((*pTable)->height - j - 1)) = temp;

        }

    }

#undef PTABLE_PIXEL_AT

}

// IDA: void __cdecl InitDepthEffects()

void InitDepthEffects(void) {

    tPath_name the_path;

    int i;

    int j;

    LoadDepthTable("DEPTHCUE.TAB", &gDepth_shade_table, &gDepth_shade_table_power);

    LoadDepthTable("FOG.TAB", &gFog_shade_table, &gFog_shade_table_power);

    LoadDepthTable("ACIDFOG.TAB", &gAcid_shade_table, &gAcid_shade_table_power);

    LoadDepthTable("BLUEGIT.TAB", &gWater_shade_table, &gWater_shade_table_power);

    GenerateSmokeShades();

    PathCat(the_path, gApplication_path, "MATERIAL");

    PathCat(the_path, the_path, "HORIZON.MAT");

    gHorizon_material = BrMaterialLoad(the_path);

    if (gHorizon_material == NULL) {

        FatalError(kFatalError_FindSkyMaterial_S, "HORIZON.MAT"); // 2nd argument added

    }

    gHorizon_material->index_blend = BrPixelmapAllocate(BR_PMT_INDEX_8, 256, 256, NULL, 0);

    // HACK: moved below loop

    // BrTableAdd(gHorizon_material->index_blend);

    for (i = 0; i < 256; i++) {

        for (j = 0; j < 256; j++) {

            *((tU8*)gHorizon_material->index_blend->pixels + 256 * i + j) = j;

        }

    }

    // HACK: this should be above the for loop. Haven't been able to figure out how this is working in OG, as changes made to the pixelmap

    // don't update the stored copy without calling `BrTableUpdate`.

    BrTableAdd(gHorizon_material->index_blend);

    gHorizon_material->flags |= BR_MATF_PERSPECTIVE;

    BrMaterialAdd(gHorizon_material);

    gForward_sky_model = CreateHorizonModel(gCamera);

    gRearview_sky_model = CreateHorizonModel(gRearview_camera);

    BrModelAdd(gForward_sky_model);

    BrModelAdd(gRearview_sky_model);

    gForward_sky_actor = BrActorAllocate(BR_ACTOR_MODEL, NULL);

    gForward_sky_actor->model = gForward_sky_model;

    gForward_sky_actor->material = gHorizon_material;

    gForward_sky_actor->render_style = BR_RSTYLE_NONE;

    BrActorAdd(gUniverse_actor, gForward_sky_actor);

    gRearview_sky_actor = BrActorAllocate(BR_ACTOR_MODEL, NULL);

    gRearview_sky_actor->model = gRearview_sky_model;

    gRearview_sky_actor->material = gHorizon_material;

    gRearview_sky_actor->render_style = BR_RSTYLE_NONE;

    BrActorAdd(gUniverse_actor, gRearview_sky_actor);

    gLast_camera_special_volume = 0;

}

// IDA: void __usercall DoDepthByShadeTable(br_pixelmap *pRender_buffer@<EAX>, br_pixelmap *pDepth_buffer@<EDX>, br_pixelmap *pShade_table@<EBX>, int pShade_table_power@<ECX>, int pStart, int pEnd)

void DoDepthByShadeTable(br_pixelmap* pRender_buffer, br_pixelmap* pDepth_buffer, br_pixelmap* pShade_table, int pShade_table_power, int pStart, int pEnd) {

    tU8* render_ptr;

    tU8* shade_table_pixels;

    tU16* depth_ptr;

    tU16 depth_value;

    tU16 too_near;

    int depth_shift_amount;

    //int depth_start; // Pierre-Marie Baty -- unused variable

    int y;

    int x;

    int depth_line_skip;

    int render_line_skip;

    LOG_TRACE("(%p, %p, %p, %d, %d, %d)", pRender_buffer, pDepth_buffer, pShade_table, pShade_table_power, pStart, pEnd);

    too_near = 0xffff - (1 << pStart);

    shade_table_pixels = pShade_table->pixels;

    depth_shift_amount = pShade_table_power + 8 - pStart - pEnd;

    render_ptr = (tU8*)pRender_buffer->pixels + pRender_buffer->base_x + pRender_buffer->base_y * pRender_buffer->row_bytes;

    depth_ptr = pDepth_buffer->pixels;

    render_line_skip = pRender_buffer->row_bytes - pRender_buffer->width;

    depth_line_skip = pDepth_buffer->row_bytes / 2 - pRender_buffer->width;

    if (depth_shift_amount <= 0) {

        if (depth_shift_amount >= 0) {

            for (y = 0; y < pRender_buffer->height; ++y) {

                for (x = 0; x < pRender_buffer->width; ++x) {

                    if (*depth_ptr != 0xFFFF) {

                        depth_value = *depth_ptr - too_near;

                        if (depth_value < -(int16_t)too_near) {

                            *render_ptr = shade_table_pixels[(depth_value & 0xFF00) + *render_ptr];

                        }

                    }

                    ++render_ptr;

                    ++depth_ptr;

                }

                render_ptr += render_line_skip;

                depth_ptr += depth_line_skip;

            }

        } else {

            for (y = 0; pRender_buffer->height > y; ++y) {

                for (x = 0; pRender_buffer->width > x; ++x) {

                    if (*depth_ptr != 0xFFFF) {

                        depth_value = *depth_ptr - too_near;

                        if (depth_value < -(int16_t)too_near) {

                            *render_ptr = shade_table_pixels[*render_ptr + ((depth_value >> (pEnd - (pShade_table_power + 8 - pStart))) & 0xFF00)];

                        }

                    }

                    ++render_ptr;

                    ++depth_ptr;

                }

                render_ptr += render_line_skip;

                depth_ptr += depth_line_skip;

            }

        }

    } else {

        for (y = 0; pRender_buffer->height > y; ++y) {

            for (x = 0; pRender_buffer->width > x; ++x) {

                if (*depth_ptr != 0xFFFF) {

                    depth_value = *depth_ptr - too_near;

                    if (depth_value < -(int16_t)too_near) {

                        *render_ptr = shade_table_pixels[*render_ptr + ((depth_value << depth_shift_amount) & 0xFF00)];

                    }

                }

                ++render_ptr;

                ++depth_ptr;

            }

            render_ptr += render_line_skip;

            depth_ptr += depth_line_skip;

        }

    }

}

// IDA: void __usercall ExternalSky(br_pixelmap *pRender_buffer@<EAX>, br_pixelmap *pDepth_buffer@<EDX>, br_actor *pCamera@<EBX>, br_matrix34 *pCamera_to_world@<ECX>)

void ExternalSky(br_pixelmap* pRender_buffer, br_pixelmap* pDepth_buffer, br_actor* pCamera, br_matrix34* pCamera_to_world) {

    int dst_x;

    int src_x;

    int dx;

    int hori_y;

    int top_y;

    int hori_pixels;

    //br_angle yaw; // Pierre-Marie Baty -- unused variable

    br_angle hori_sky;

    //br_angle pitch; // Pierre-Marie Baty -- unused variable

    br_angle vert_sky;

    br_camera* camera;

    br_scalar tan_half_fov;

    br_scalar tan_half_hori_fov;

    br_scalar tan_half_hori_sky;

    br_scalar hshift;

    br_scalar tan_pitch;

    tU8 top_col;

    tU8 bot_col;

    int bot_height;

    //int repetitions; // Pierre-Marie Baty -- unused variable

    br_pixelmap* col_map;

    LOG_TRACE("(%p, %p, %p, %p)", pRender_buffer, pDepth_buffer, pCamera, pCamera_to_world);

    dst_x = 0;

    col_map = gHorizon_material->colour_map;

    camera = (br_camera*)pCamera->type_data;

    tan_half_fov = Tan(camera->field_of_view / 2);

    tan_half_hori_fov = tan_half_fov * camera->aspect;

    vert_sky = BrRadianToAngle(atan2(pCamera_to_world->m[2][0], pCamera_to_world->m[2][2]));

    hori_sky = BrRadianToAngle(atan2(col_map->width * tan_half_hori_fov / (double)pRender_buffer->width, 1));

    tan_half_hori_sky = -BrFixedToFloat(vert_sky) / BrFixedToFloat(BR_ANGLE_DEG(360) / (int)(1.0f / BrFixedToFloat(2 * hori_sky) + 0.5f));

    dx = col_map->width * tan_half_hori_sky;

    while (dx < 0) {

        dx += col_map->width;

    }

    while (dx > col_map->width) {

        dx -= col_map->width;

    }

    hshift = col_map->height - gSky_image_underground * col_map->height / gSky_image_height;

    tan_pitch = sqrtf(pCamera_to_world->m[2][0] * pCamera_to_world->m[2][0] + pCamera_to_world->m[2][2] * pCamera_to_world->m[2][2]);

    hori_y = -(pCamera_to_world->m[2][1]

                 / tan_pitch

                 / tan_half_fov * pRender_buffer->height / 2.0f)

        - hshift;

    while (dst_x < pRender_buffer->width) {

        hori_pixels = col_map->width - dx;

        if (hori_pixels > pRender_buffer->width - dst_x) {

            hori_pixels = pRender_buffer->width - dst_x;

        }

        src_x = dx - col_map->origin_x;

        DRPixelmapRectangleCopy(pRender_buffer, dst_x - pRender_buffer->origin_x, hori_y, col_map, src_x, -col_map->origin_y, hori_pixels, col_map->height);

        dx = 0;

        dst_x += hori_pixels;

    }

    top_y = hori_y + pRender_buffer->origin_y;

    if (top_y > 0) {

        top_col = ((tU8*)col_map->pixels)[0];

        DRPixelmapRectangleFill(pRender_buffer, -pRender_buffer->origin_x, -pRender_buffer->origin_y, pRender_buffer->width, top_y, top_col);

    }

    bot_height = pRender_buffer->height - pRender_buffer->origin_y - hori_y - col_map->height;

    if (bot_height > 0) {

        bot_col = ((tU8*)col_map->pixels)[col_map->row_bytes * (col_map->height - 1)];

        DRPixelmapRectangleFill(pRender_buffer, -pRender_buffer->origin_x, hori_y + col_map->height, pRender_buffer->width, bot_height, bot_col);

    }

}

#define ACTOR_CAMERA(ACTOR) ((br_camera*)((ACTOR)->type_data))

// IDA: void __usercall DoHorizon(br_pixelmap *pRender_buffer@<EAX>, br_pixelmap *pDepth_buffer@<EDX>, br_actor *pCamera@<EBX>, br_matrix34 *pCamera_to_world@<ECX>)

void DoHorizon(br_pixelmap* pRender_buffer, br_pixelmap* pDepth_buffer, br_actor* pCamera, br_matrix34* pCamera_to_world) {

    br_angle yaw;

    br_actor* actor;

    LOG_TRACE("(%p, %p, %p, %p)", pRender_buffer, pDepth_buffer, pCamera, pCamera_to_world);

    yaw = BrRadianToAngle(atan2f(pCamera_to_world->m[2][0], pCamera_to_world->m[2][2]));

    if (!gProgram_state.cockpit_on && !(gAction_replay_mode && gAction_replay_camera_mode)) {

        return;

    }

    if (gRendering_mirror) {

        actor = gRearview_sky_actor;

    } else {

        actor = gForward_sky_actor;

        if (ACTOR_CAMERA(gCamera)->field_of_view != gOld_fov || ACTOR_CAMERA(gCamera)->yon_z != gOld_yon) {

            gOld_fov = ACTOR_CAMERA(gCamera)->field_of_view;

            gOld_yon = ACTOR_CAMERA(gCamera)->yon_z;

            MungeSkyModel(gCamera, gForward_sky_model);

        }

    }

    BrMatrix34RotateY(&actor->t.t.mat, yaw);

    BrVector3Copy(&actor->t.t.translate.t, (br_vector3*)pCamera_to_world->m[3]);

    gHorizon_material->map_transform.m[0][0] = 1.f;

    gHorizon_material->map_transform.m[0][1] = 0.f;

    gHorizon_material->map_transform.m[1][0] = 0.f;

    gHorizon_material->map_transform.m[1][1] = 1.f;

    gHorizon_material->map_transform.m[2][0] = -BrFixedToFloat(yaw) / BrFixedToFloat(gSky_image_width);

    gHorizon_material->map_transform.m[2][1] = 0.f;

    BrMaterialUpdate(gHorizon_material, BR_MATU_ALL);

    actor->render_style = BR_RSTYLE_FACES;

    BrZbSceneRenderAdd(actor);

    actor->render_style = BR_RSTYLE_NONE;

}

// IDA: void __usercall DoDepthCue(br_pixelmap *pRender_buffer@<EAX>, br_pixelmap *pDepth_buffer@<EDX>)

void DoDepthCue(br_pixelmap* pRender_buffer, br_pixelmap* pDepth_buffer) {

    LOG_TRACE("(%p, %p)", pRender_buffer, pDepth_buffer);

    DoDepthByShadeTable(

        pRender_buffer,

        pDepth_buffer,

        gDepth_shade_table,

        gDepth_shade_table_power,

        gProgram_state.current_depth_effect.start,

        gProgram_state.current_depth_effect.end);

}

// IDA: void __usercall DoFog(br_pixelmap *pRender_buffer@<EAX>, br_pixelmap *pDepth_buffer@<EDX>)

void DoFog(br_pixelmap* pRender_buffer, br_pixelmap* pDepth_buffer) {

    LOG_TRACE("(%p, %p)", pRender_buffer, pDepth_buffer);

    DoDepthByShadeTable(

        pRender_buffer,

        pDepth_buffer,

        gFog_shade_table,

        gFog_shade_table_power,

        gProgram_state.current_depth_effect.start,

        gProgram_state.current_depth_effect.end);

}

// IDA: void __usercall DepthEffect(br_pixelmap *pRender_buffer@<EAX>, br_pixelmap *pDepth_buffer@<EDX>, br_actor *pCamera@<EBX>, br_matrix34 *pCamera_to_world@<ECX>)

void DepthEffect(br_pixelmap* pRender_buffer, br_pixelmap* pDepth_buffer, br_actor* pCamera, br_matrix34* pCamera_to_world) {

    LOG_TRACE("(%p, %p, %p, %p)", pRender_buffer, pDepth_buffer, pCamera, pCamera_to_world);

    if (gProgram_state.current_depth_effect.type == eDepth_effect_darkness) {

        DoDepthCue(pRender_buffer, pDepth_buffer);

    }

    if (gProgram_state.current_depth_effect.type == eDepth_effect_fog) {

        DoFog(pRender_buffer, pDepth_buffer);

    }

}

// IDA: void __usercall DepthEffectSky(br_pixelmap *pRender_buffer@<EAX>, br_pixelmap *pDepth_buffer@<EDX>, br_actor *pCamera@<EBX>, br_matrix34 *pCamera_to_world@<ECX>)

void DepthEffectSky(br_pixelmap* pRender_buffer, br_pixelmap* pDepth_buffer, br_actor* pCamera, br_matrix34* pCamera_to_world) {

    LOG_TRACE("(%p, %p, %p, %p)", pRender_buffer, pDepth_buffer, pCamera, pCamera_to_world);

    if (gProgram_state.current_depth_effect.sky_texture != NULL

        && (gLast_camera_special_volume == NULL || gLast_camera_special_volume->sky_col < 0)) {

        DoHorizon(pRender_buffer, pDepth_buffer, pCamera, pCamera_to_world);

    }

}

// IDA: void __usercall DoWobbleCamera(br_actor *pCamera@<EAX>)

void DoWobbleCamera(br_actor* pCamera) {

    float f_time;

    static br_scalar mag00 = 0.02f;

    static br_scalar mag01 = 0.02f;

    static br_scalar mag02 = 0.02f;

    static br_scalar mag10 = 0.15f;

    static br_scalar mag11 = 0.05f;

    static br_scalar mag12 = 0.02f;

    static br_scalar mag20 = 0.f;

    static br_scalar mag21 = 0.f;

    static br_scalar mag22 = 0.f;

    static float period00 = 3000.f;

    static float period01 = 3000.f;

    static float period02 = 4000.f;

    static float period10 = 2200.f;

    static float period11 = 3300.f;

    static float period12 = 3100.f;

    static float period20 = 2800.f;

    static float period21 = 2500.f;

    static float period22 = 3900.f;

    LOG_TRACE("(%p)", pCamera);

    f_time = (float)PDGetTotalTime();

    pCamera->t.t.mat.m[0][0] += FastScalarSin(fmod(f_time / period00 * 360.f, 360.f)) * mag00;

    pCamera->t.t.mat.m[0][1] += FastScalarSin(fmod(f_time / period01 * 360.f, 360.f)) * mag01;

    pCamera->t.t.mat.m[0][2] += FastScalarSin(fmod(f_time / period02 * 360.f, 360.f)) * mag02;

    pCamera->t.t.mat.m[1][0] += FastScalarSin(fmod(f_time / period10 * 360.f, 360.f)) * mag10;

    pCamera->t.t.mat.m[1][1] += FastScalarSin(fmod(f_time / period11 * 360.f, 360.f)) * mag11;

    pCamera->t.t.mat.m[1][2] += FastScalarSin(fmod(f_time / period12 * 360.f, 360.f)) * mag12;

    pCamera->t.t.mat.m[2][0] += FastScalarSin(fmod(f_time / period20 * 360.f, 360.f)) * mag20;

    pCamera->t.t.mat.m[2][1] += FastScalarSin(fmod(f_time / period21 * 360.f, 360.f)) * mag21;

    pCamera->t.t.mat.m[2][2] += FastScalarSin(fmod(f_time / period22 * 360.f, 360.f)) * mag22;

}

// IDA: void __usercall DoDrugWobbleCamera(br_actor *pCamera@<EAX>)

void DoDrugWobbleCamera(br_actor* pCamera) {

    float f_time;

    static br_scalar mag00 = 0.03f;

    static br_scalar mag01 = 0.03f;

    static br_scalar mag02 = 0.03f;

    static br_scalar mag10 = 0.2f;

    static br_scalar mag11 = 0.07f; // Pierre-Marie Baty -- missing float suffix

    static br_scalar mag12 = 0.03f;

    static br_scalar mag20 = 0.02f;

    static br_scalar mag21 = 0.03f;

    static br_scalar mag22 = 0.01f;

    static float period00 = 550.f;

    static float period01 = 700.f;

    static float period02 = 200.f;

    static float period10 = 100.f;

    static float period11 = 1300.f;

    static float period12 = 500.f;

    static float period20 = 800.f;

    static float period21 = 1500.f;

    static float period22 = 300.f;

    LOG_TRACE("(%p)", pCamera);

    f_time = (float)PDGetTotalTime();

    pCamera->t.t.mat.m[0][0] += FastScalarSin(fmod(f_time / period00 * 360.f, 360.f)) * mag00;

    pCamera->t.t.mat.m[0][1] += FastScalarSin(fmod(f_time / period01 * 360.f, 360.f)) * mag01;

    pCamera->t.t.mat.m[0][2] += FastScalarSin(fmod(f_time / period02 * 360.f, 360.f)) * mag02;

    pCamera->t.t.mat.m[1][0] += FastScalarSin(fmod(f_time / period10 * 360.f, 360.f)) * mag10;