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https://github.com/ddnet/ddnet.git
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297 lines
7.7 KiB
C++
297 lines
7.7 KiB
C++
// copyright (c) 2007 magnus auvinen, see licence.txt for more info
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#include <math.h>
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#include <base/math.h>
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#include <engine/graphics.h>
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#include "render.h"
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void CRenderTools::RenderEvalEnvelope(CEnvPoint *pPoints, int NumPoints, int Channels, float Time, float *pResult)
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{
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if(NumPoints == 0)
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{
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pResult[0] = 0;
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pResult[1] = 0;
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pResult[2] = 0;
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pResult[3] = 0;
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return;
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}
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if(NumPoints == 1)
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{
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pResult[0] = fx2f(pPoints[0].m_aValues[0]);
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pResult[1] = fx2f(pPoints[0].m_aValues[1]);
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pResult[2] = fx2f(pPoints[0].m_aValues[2]);
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pResult[3] = fx2f(pPoints[0].m_aValues[3]);
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return;
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}
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Time = fmod(Time, pPoints[NumPoints-1].m_Time/1000.0f)*1000.0f;
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for(int i = 0; i < NumPoints-1; i++)
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{
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if(Time >= pPoints[i].m_Time && Time <= pPoints[i+1].m_Time)
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{
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float Delta = pPoints[i+1].m_Time-pPoints[i].m_Time;
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float a = (Time-pPoints[i].m_Time)/Delta;
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if(pPoints[i].m_Curvetype == CURVETYPE_SMOOTH)
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a = -2*a*a*a + 3*a*a; // second hermite basis
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else if(pPoints[i].m_Curvetype == CURVETYPE_SLOW)
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a = a*a*a;
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else if(pPoints[i].m_Curvetype == CURVETYPE_FAST)
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{
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a = 1-a;
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a = 1-a*a*a;
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}
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else if (pPoints[i].m_Curvetype == CURVETYPE_STEP)
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a = 0;
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else
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{
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// linear
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}
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for(int c = 0; c < Channels; c++)
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{
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float v0 = fx2f(pPoints[i].m_aValues[c]);
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float v1 = fx2f(pPoints[i+1].m_aValues[c]);
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pResult[c] = v0 + (v1-v0) * a;
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}
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return;
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}
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}
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pResult[0] = fx2f(pPoints[NumPoints-1].m_aValues[0]);
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pResult[1] = fx2f(pPoints[NumPoints-1].m_aValues[1]);
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pResult[2] = fx2f(pPoints[NumPoints-1].m_aValues[2]);
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pResult[3] = fx2f(pPoints[NumPoints-1].m_aValues[3]);
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return;
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}
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static void Rotate(CPoint *pCenter, CPoint *pPoint, float Rotation)
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{
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int x = pPoint->x - pCenter->x;
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int y = pPoint->y - pCenter->y;
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pPoint->x = (int)(x * cosf(Rotation) - y * sinf(Rotation) + pCenter->x);
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pPoint->y = (int)(x * sinf(Rotation) + y * cosf(Rotation) + pCenter->y);
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}
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void CRenderTools::RenderQuads(CQuad *pQuads, int NumQuads, int RenderFlags, void (*pfnEval)(float TimeOffset, int Env, float *pChannels, void *pUser), void *pUser)
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{
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Graphics()->QuadsBegin();
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float Conv = 1/255.0f;
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for(int i = 0; i < NumQuads; i++)
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{
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CQuad *q = &pQuads[i];
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float r=1, g=1, b=1, a=1;
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if(q->m_ColorEnv >= 0)
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{
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float aChannels[4];
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pfnEval(q->m_ColorEnvOffset/1000.0f, q->m_ColorEnv, aChannels, pUser);
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r = aChannels[0];
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g = aChannels[1];
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b = aChannels[2];
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a = aChannels[3];
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}
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bool Opaque = false;
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if(a < 0.01f || (q->m_aColors[0].a < 0.01f && q->m_aColors[1].a < 0.01f && q->m_aColors[2].a < 0.01f && q->m_aColors[3].a < 0.01f))
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Opaque = true;
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if(Opaque && !(RenderFlags&LAYERRENDERFLAG_OPAQUE))
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continue;
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if(!Opaque && !(RenderFlags&LAYERRENDERFLAG_TRANSPARENT))
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continue;
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Graphics()->QuadsSetSubsetFree(
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fx2f(q->m_aTexcoords[0].x), fx2f(q->m_aTexcoords[0].y),
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fx2f(q->m_aTexcoords[1].x), fx2f(q->m_aTexcoords[1].y),
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fx2f(q->m_aTexcoords[2].x), fx2f(q->m_aTexcoords[2].y),
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fx2f(q->m_aTexcoords[3].x), fx2f(q->m_aTexcoords[3].y)
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);
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float OffsetX = 0;
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float OffsetY = 0;
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float Rot = 0;
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// TODO: fix this
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if(q->m_PosEnv >= 0)
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{
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float aChannels[4];
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pfnEval(q->m_PosEnvOffset/1000.0f, q->m_PosEnv, aChannels, pUser);
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OffsetX = aChannels[0];
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OffsetY = aChannels[1];
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Rot = aChannels[2]/360.0f*pi*2;
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}
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IGraphics::CColorVertex Array[4] = {
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IGraphics::CColorVertex(0, q->m_aColors[0].r*Conv*r, q->m_aColors[0].g*Conv*g, q->m_aColors[0].b*Conv*b, q->m_aColors[0].a*Conv*a),
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IGraphics::CColorVertex(1, q->m_aColors[1].r*Conv*r, q->m_aColors[1].g*Conv*g, q->m_aColors[1].b*Conv*b, q->m_aColors[1].a*Conv*a),
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IGraphics::CColorVertex(2, q->m_aColors[2].r*Conv*r, q->m_aColors[2].g*Conv*g, q->m_aColors[2].b*Conv*b, q->m_aColors[2].a*Conv*a),
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IGraphics::CColorVertex(3, q->m_aColors[3].r*Conv*r, q->m_aColors[3].g*Conv*g, q->m_aColors[3].b*Conv*b, q->m_aColors[3].a*Conv*a)};
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Graphics()->SetColorVertex(Array, 4);
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CPoint *pPoints = q->m_aPoints;
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if(Rot != 0)
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{
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static CPoint aRotated[4];
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aRotated[0] = q->m_aPoints[0];
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aRotated[1] = q->m_aPoints[1];
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aRotated[2] = q->m_aPoints[2];
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aRotated[3] = q->m_aPoints[3];
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pPoints = aRotated;
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Rotate(&q->m_aPoints[4], &aRotated[0], Rot);
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Rotate(&q->m_aPoints[4], &aRotated[1], Rot);
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Rotate(&q->m_aPoints[4], &aRotated[2], Rot);
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Rotate(&q->m_aPoints[4], &aRotated[3], Rot);
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}
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IGraphics::CFreeformItem Freeform(
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fx2f(pPoints[0].x)+OffsetX, fx2f(pPoints[0].y)+OffsetY,
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fx2f(pPoints[1].x)+OffsetX, fx2f(pPoints[1].y)+OffsetY,
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fx2f(pPoints[2].x)+OffsetX, fx2f(pPoints[2].y)+OffsetY,
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fx2f(pPoints[3].x)+OffsetX, fx2f(pPoints[3].y)+OffsetY);
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Graphics()->QuadsDrawFreeform(&Freeform, 1);
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}
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Graphics()->QuadsEnd();
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}
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void CRenderTools::RenderTilemap(CTile *pTiles, int w, int h, float Scale, vec4 Color, int RenderFlags)
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{
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//Graphics()->TextureSet(img_get(tmap->image));
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float ScreenX0, ScreenY0, ScreenX1, ScreenY1;
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Graphics()->GetScreen(&ScreenX0, &ScreenY0, &ScreenX1, &ScreenY1);
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//Graphics()->MapScreen(screen_x0-50, screen_y0-50, screen_x1+50, screen_y1+50);
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// calculate the final pixelsize for the tiles
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float TilePixelSize = 1024/32.0f;
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float FinalTileSize = Scale/(ScreenX1-ScreenX0) * Graphics()->ScreenWidth();
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float FinalTilesetScale = FinalTileSize/TilePixelSize;
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Graphics()->QuadsBegin();
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Graphics()->SetColor(Color.r, Color.g, Color.b, Color.a);
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int StartY = (int)(ScreenY0/Scale)-1;
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int StartX = (int)(ScreenX0/Scale)-1;
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int EndY = (int)(ScreenY1/Scale)+1;
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int EndX = (int)(ScreenX1/Scale)+1;
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// adjust the texture shift according to mipmap level
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float TexSize = 1024.0f;
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float Frac = (1.25f/TexSize) * (1/FinalTilesetScale);
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float Nudge = (0.5f/TexSize) * (1/FinalTilesetScale);
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for(int y = StartY; y < EndY; y++)
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for(int x = StartX; x < EndX; x++)
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{
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int mx = x;
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int my = y;
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if(RenderFlags&TILERENDERFLAG_EXTEND)
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{
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if(mx<0)
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mx = 0;
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if(mx>=w)
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mx = w-1;
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if(my<0)
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my = 0;
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if(my>=h)
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my = h-1;
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}
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else
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{
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if(mx<0)
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continue; // mx = 0;
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if(mx>=w)
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continue; // mx = w-1;
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if(my<0)
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continue; // my = 0;
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if(my>=h)
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continue; // my = h-1;
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}
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int c = mx + my*w;
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unsigned char Index = pTiles[c].m_Index;
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if(Index)
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{
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unsigned char Flags = pTiles[c].m_Flags;
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bool Render = false;
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if(Flags&TILEFLAG_OPAQUE)
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{
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if(RenderFlags&LAYERRENDERFLAG_OPAQUE)
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Render = true;
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}
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else
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{
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if(RenderFlags&LAYERRENDERFLAG_TRANSPARENT)
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Render = true;
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}
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if(Render)
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{
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int tx = Index%16;
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int ty = Index/16;
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int Px0 = tx*(1024/16);
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int Py0 = ty*(1024/16);
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int Px1 = Px0+(1024/16)-1;
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int Py1 = Py0+(1024/16)-1;
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float x0 = Nudge + Px0/TexSize+Frac;
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float y0 = Nudge + Py0/TexSize+Frac;
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float x1 = Nudge + Px1/TexSize-Frac;
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float y1 = Nudge + Py0/TexSize+Frac;
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float x2 = Nudge + Px1/TexSize-Frac;
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float y2 = Nudge + Py1/TexSize-Frac;
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float x3 = Nudge + Px0/TexSize+Frac;
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float y3 = Nudge + Py1/TexSize-Frac;
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if(Flags&TILEFLAG_VFLIP)
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{
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x0 = x2;
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x1 = x3;
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x2 = x3;
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x3 = x0;
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}
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if(Flags&TILEFLAG_HFLIP)
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{
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y0 = y3;
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y2 = y1;
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y3 = y1;
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y1 = y0;
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}
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if(Flags&TILEFLAG_ROTATE)
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{
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float Tmp = x0;
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x0 = x3;
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x3 = x2;
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x2 = x1;
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x1 = Tmp;
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Tmp = y0;
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y0 = y3;
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y3 = y2;
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y2 = y1;
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y1 = Tmp;
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}
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Graphics()->QuadsSetSubsetFree(x0, y0, x1, y1, x2, y2, x3, y3);
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IGraphics::CQuadItem QuadItem(x*Scale, y*Scale, Scale, Scale);
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Graphics()->QuadsDrawTL(&QuadItem, 1);
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}
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}
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x += pTiles[c].m_Skip;
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}
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Graphics()->QuadsEnd();
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Graphics()->MapScreen(ScreenX0, ScreenY0, ScreenX1, ScreenY1);
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}
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