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#include "IsometricDrawer.h"
#include "Drawer.h"
#include "Graphics.h"
#include "PackedCol.h"
#include "ExtMath.h"
#include "Block.h"
#include "TexturePack.h"
#include "Block.h"
#include "Game.h"
static struct VertexTextured* iso_vertices;
static struct VertexTextured* iso_vertices_base;
static int* iso_state;
static cc_bool iso_cacheInited;
static PackedCol iso_colorXSide, iso_colorZSide, iso_colorYBottom;
static float iso_posX, iso_posY;
#define iso_cosX (0.86602540378443864f) /* cos(30 * MATH_DEG2RAD) */
#define iso_sinX (0.50000000000000000f) /* sin(30 * MATH_DEG2RAD) */
#define iso_cosY (0.70710678118654752f) /* cos(-45 * MATH_DEG2RAD) */
#define iso_sinY (-0.70710678118654752f) /* sin(-45 * MATH_DEG2RAD) */
static void IsometricDrawer_InitCache(void) {
if (iso_cacheInited) return;
iso_cacheInited = true;
PackedCol_GetShaded(PACKEDCOL_WHITE,
&iso_colorXSide, &iso_colorZSide, &iso_colorYBottom);
}
static TextureLoc IsometricDrawer_GetTexLoc(BlockID block, Face face) {
TextureLoc loc = Block_Tex(block, face);
*iso_state++ = Atlas1D_Index(loc);
return loc;
}
static void IsometricDrawer_Flat(BlockID block, float size) {
int texIndex;
TextureLoc loc = Block_Tex(block, FACE_ZMAX);
TextureRec rec = Atlas1D_TexRec(loc, 1, &texIndex);
struct VertexTextured v;
float minX, maxX, minY, maxY;
float scale;
*iso_state++ = texIndex;
v.Col = PACKEDCOL_WHITE;
Block_Tint(v.Col, block);
/* Rescale by 0.70 in Classic mode to match vanilla size */
/* Rescale by 0.88 in Enhanced mode to be slightly nicer */
/* Default selected size: 54px -> 48px */
/* Default inventory size: 36px -> 32px */
/* Default hotbar size: 28px -> 24px */
scale = Game_ClassicMode ? 0.70f : 0.88f;
size = Math_Ceil(size * scale);
minX = iso_posX - size; maxX = iso_posX + size;
minY = iso_posY - size; maxY = iso_posY + size;
v.z = 0.0f;
v.x = minX; v.y = minY; v.U = rec.u1; v.V = rec.v1; *iso_vertices++ = v;
v.y = maxY; v.V = rec.v2; *iso_vertices++ = v;
v.x = maxX; v.U = rec.u2; *iso_vertices++ = v;
v.y = minY; v.V = rec.v1; *iso_vertices++ = v;
}
static void IsometricDrawer_Angled(BlockID block, float size) {
cc_bool bright;
Vec3 min, max;
struct VertexTextured* beg = iso_vertices;
struct VertexTextured* v;
float x, y, scale;
/* isometric coords size: cosY * -scale - sinY * scale */
/* we need to divide by (2 * cosY), as the calling function expects size to be in pixels. */
scale = size / (2.0f * iso_cosY);
Drawer.MinBB = Blocks.MinBB[block]; Drawer.MinBB.y = 1.0f - Drawer.MinBB.y;
Drawer.MaxBB = Blocks.MaxBB[block]; Drawer.MaxBB.y = 1.0f - Drawer.MaxBB.y;
min = Blocks.MinBB[block]; max = Blocks.MaxBB[block];
Drawer.X1 = scale * (1.0f - min.x * 2.0f);
Drawer.X2 = scale * (1.0f - max.x * 2.0f);
Drawer.Y1 = scale * (1.0f - min.y * 2.0f);
Drawer.Y2 = scale * (1.0f - max.y * 2.0f);
Drawer.Z1 = scale * (1.0f - min.z * 2.0f);
Drawer.Z2 = scale * (1.0f - max.z * 2.0f);
bright = Blocks.Brightness[block];
Drawer.Tinted = Blocks.Tinted[block];
Drawer.TintCol = Blocks.FogCol[block];
Drawer_XMax(1, bright ? PACKEDCOL_WHITE : iso_colorXSide,
IsometricDrawer_GetTexLoc(block, FACE_XMAX), &iso_vertices);
Drawer_ZMin(1, bright ? PACKEDCOL_WHITE : iso_colorZSide,
IsometricDrawer_GetTexLoc(block, FACE_ZMIN), &iso_vertices);
Drawer_YMax(1, PACKEDCOL_WHITE,
IsometricDrawer_GetTexLoc(block, FACE_YMAX), &iso_vertices);
for (v = beg; v < iso_vertices; v++)
{
/* Cut down form of: */
/* Matrix_RotateY(&rotY, 45.0f * MATH_DEG2RAD); */
/* Matrix_RotateX(&rotX, -30.0f * MATH_DEG2RAD); */
/* Matrix_Mul(&iso_transform, &rotY, &rotX); */
/* ... */
/* Vec3 vec = { v.x, v.y, v.z }; */
/* Vec3_Transform(&vec, &vec, &iso_transform); */
/* With all unnecessary operations either simplified or removed */
x = v->x * iso_cosY + v->z * -iso_sinY;
y = v->x * iso_sinX * iso_sinY + v->y * iso_cosX + v->z * iso_sinX * iso_cosY;
v->x = x + iso_posX;
v->y = y + iso_posY;
}
}
void IsometricDrawer_BeginBatch(struct VertexTextured* vertices, int* state) {
IsometricDrawer_InitCache();
iso_vertices = vertices;
iso_vertices_base = vertices;
iso_state = state; /* TODO just store TextureLoc ??? */
}
void IsometricDrawer_AddBatch(BlockID block, float size, float x, float y) {
if (Blocks.Draw[block] == DRAW_GAS) return;
iso_posX = x; iso_posY = y;
/* See comment in Gfx_Make2DQuad() for why 0.5 is subtracted in D3D9 */
/* TODO pass as arguments? test diff */
#if CC_GFX_BACKEND == CC_GFX_BACKEND_D3D9
iso_posX -= 0.5f; iso_posY -= 0.5f;
#endif
if (Blocks.Draw[block] == DRAW_SPRITE) {
IsometricDrawer_Flat(block, size);
} else {
IsometricDrawer_Angled(block, size);
}
}
int IsometricDrawer_EndBatch(void) {
return (int)(iso_vertices - iso_vertices_base);
}
void IsometricDrawer_Render(int count, int offset, int* state) {
int i, curIdx, batchBeg, batchLen;
curIdx = state[0];
batchLen = 0;
batchBeg = offset;
for (i = 0; i < count / 4; i++, batchLen += 4)
{
if (state[i] == curIdx) continue;
/* Flush previous batch */
Gfx_BindTexture(Atlas1D.TexIds[curIdx]);
Gfx_DrawVb_IndexedTris_Range(batchLen, batchBeg);
/* Reset for next batch */
curIdx = state[i];
batchBeg += batchLen;
batchLen = 0;
}
Gfx_BindTexture(Atlas1D.TexIds[curIdx]);
Gfx_DrawVb_IndexedTris_Range(batchLen, batchBeg);
}
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