43 lines
844 B
C
43 lines
844 B
C
#include <c3d/mtxstack.h>
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#include <c3d/uniforms.h>
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void MtxStack_Init(C3D_MtxStack* stk)
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{
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stk->pos = 0;
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stk->unifPos = 0xFF;
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stk->isDirty = true;
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Mtx_Identity(&stk->m[0]);
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}
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void MtxStack_Bind(C3D_MtxStack* stk, GPU_SHADER_TYPE unifType, int unifPos, int unifLen)
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{
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stk->unifType = unifType;
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stk->unifPos = unifPos;
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stk->unifLen = unifLen;
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stk->isDirty = true;
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}
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void MtxStack_Push(C3D_MtxStack* stk)
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{
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if (stk->pos == (C3D_MTXSTACK_SIZE-1)) return;
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stk->pos ++;
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Mtx_Copy(&stk->m[stk->pos], &stk->m[stk->pos-1]);
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}
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void MtxStack_Pop(C3D_MtxStack* stk)
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{
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if (stk->pos == 0) return;
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stk->pos --;
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stk->isDirty = true;
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}
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void MtxStack_Update(C3D_MtxStack* stk)
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{
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if (!stk->isDirty) return;
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if (stk->unifPos != 0xFF)
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C3D_FVUnifMtxNx4(stk->unifType, stk->unifPos, &stk->m[stk->pos], stk->unifLen);
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stk->isDirty = false;
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}
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