77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
#pragma once
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#include "private.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAX_STACK 4
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#define B000 0
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#define B111 7
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#define B100 4
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#define B010 2
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#define B001 1
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#define B101 5
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#define B011 3
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#define B110 6
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typedef struct {
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/* Remaining vertices in the source list */
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int remaining;
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/* Current position in the source list */
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Vertex* src;
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/* Vertex to read from (this may not exist in the source list) */
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Vertex* active;
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/* Sliding window into the source view */
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Vertex* triangle[3];
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/* Stack of temporary vertices */
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Vertex stack[MAX_STACK];
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int8_t stack_idx;
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/* < 8. Bitmask of the last 3 vertices */
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uint8_t visibility;
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uint8_t triangle_count;
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uint8_t padding;
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} ListIterator;
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inline ListIterator* _glIteratorBegin(void* src, int n) {
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ListIterator* it = (ListIterator*) malloc(sizeof(ListIterator));
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it->remaining = n - 1;
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it->active = (Vertex*) src;
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it->src = it->active + 1;
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it->stack_idx = -1;
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it->triangle_count = 0;
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it->visibility = 0;
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it->triangle[0] = it->triangle[1] = it->triangle[2] = NULL;
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return (n) ? it : NULL;
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}
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GL_FORCE_INLINE GLboolean isVertex(const Vertex* vertex) {
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assert(vertex);
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return (
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vertex->flags == PVR_CMD_VERTEX ||
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vertex->flags == PVR_CMD_VERTEX_EOL
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);
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}
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GL_FORCE_INLINE GLboolean isVisible(const Vertex* vertex) {
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TRACE();
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assert(vertex != NULL);
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return vertex->w >= -0.00001f; // && vertex->xyz[2] >= -vertex->w;
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}
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ListIterator* _glIteratorNext(ListIterator* it);
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#ifdef __cplusplus
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}
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#endif
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