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Converted Namco System 23 games to use new frustum clipping code.

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This commit is contained in:
Andrew Gardner 2015-09-30 11:07:43 +02:00
parent 106b674acb
commit 31b86bd828
1 changed files with 70 additions and 18 deletions
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88
src/mame/drivers/namcos23.c
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@ -1928,10 +1928,9 @@ void namcos23_state::render_project(poly_vertex &pv)
// 640/(3.125/3.75) = 768
// 480/(2.34375/3.75) = 768
float w = pv.p[0] ? 1/pv.p[0] : 0;
pv.x = 320 + 768*w*pv.x;
pv.y = 240 - 768*w*pv.y;
pv.p[0] = w;
pv.x = 320 + 768 * pv.x;
pv.y = 240 - 768 * pv.y;
pv.p[0] = 1.0f / pv.p[0];
}
static UINT32 render_texture_lookup_nocache_point(running_machine &machine, const pen_t *pens, float x, float y)
@ -2034,22 +2033,72 @@ void namcos23_state::render_one_model(const namcos23_render_entry *re)
namcos23_poly_entry *p = render.polys + render.poly_count;
// Should be unnecessary now that frustum clipping happens, but this still culls polys behind the camera
p->vertex_count = render.polymgr->zclip_if_less(ne, pv, p->pv, 4, 0.001f);
// Project if you don't clip on the near plane
if(p->vertex_count >= 3) {
for(int i=0; i<p->vertex_count; i++) {
render_project(p->pv[i]);
float w = p->pv[i].p[0];
p->pv[i].p[1] *= w;
p->pv[i].p[2] *= w;
p->pv[i].p[3] *= w;
}
p->zkey = 0.5f*(minz+maxz);
p->front = !(h & 0x00000001);
p->rd.machine = &machine();
p->rd.texture_lookup = render_texture_lookup_nocache_point;
p->rd.pens = m_palette->pens() + (color << 8);
render.poly_count++;
// Project the eye points
frustum_clip_vertex<float, 3> clipVerts[10];
for(int i=0; i<p->vertex_count; i++) {
// A basic perspective transform
const float Z = p->pv[i].p[0];
const float projX = p->pv[i].x / Z;
const float projY = p->pv[i].y / Z;
const float near = 0.001f;
const float far = 1000.0f;
const float m22 = -(far / (far-near));
const float m23 = -((far * near) / (far - near));
const float projZ = -(Z * m22) + m23;
const float projW = Z;
// Construct a frustum clipping vert from the NDCoords
clipVerts[i].x = projX;
clipVerts[i].y = projY;
clipVerts[i].z = projZ;
clipVerts[i].w = projW;
clipVerts[i].p[0] = p->pv[i].p[1];
clipVerts[i].p[1] = p->pv[i].p[2];
clipVerts[i].p[2] = p->pv[i].p[3];
}
// Clip against all edges of the view frustum
int num_vertices = frustum_clip_all<float, 3>(clipVerts, p->vertex_count, clipVerts);
if (num_vertices != 0)
{
// Push the results back into the main vertices
for (int i=0; i < num_vertices; i++)
{
p->pv[i].x = clipVerts[i].x;
p->pv[i].y = clipVerts[i].y;
p->pv[i].p[0] = clipVerts[i].w;
p->pv[i].p[1] = clipVerts[i].p[0];
p->pv[i].p[2] = clipVerts[i].p[1];
p->pv[i].p[3] = clipVerts[i].p[2];
}
p->vertex_count = num_vertices;
// This is our poor-man's projection matrix
for(int i=0; i<p->vertex_count; i++)
{
render_project(p->pv[i]);
float w = p->pv[i].p[0];
p->pv[i].p[1] *= w;
p->pv[i].p[2] *= w;
p->pv[i].p[3] *= w;
}
// Compute an odd sorta'-Z thing that can situate the polygon wherever you want in Z-depth
p->zkey = 0.5f*(minz+maxz);
p->front = !(h & 0x00000001);
p->rd.machine = &machine();
p->rd.texture_lookup = render_texture_lookup_nocache_point;
p->rd.pens = m_palette->pens() + (color << 8);
render.poly_count++;
}
}
if(type & 0x000010000)
@ -2087,12 +2136,15 @@ void namcos23_renderer::render_flush(bitmap_rgb32& bitmap)
namcos23_render_data& extra = render.polymgr->object_data_alloc();
extra = p->rd;
// We should probably split the polygons into triangles ourselves to insure everything is being rendered properly
if (p->vertex_count == 3)
render_triangle(scissor, render_delegate(FUNC(namcos23_renderer::render_scanline), this), 4, p->pv[0], p->pv[1], p->pv[2]);
else if (p->vertex_count == 4)
render_polygon<4>(scissor, render_delegate(FUNC(namcos23_renderer::render_scanline), this), 4, p->pv);
else if (p->vertex_count == 5)
render_polygon<5>(scissor, render_delegate(FUNC(namcos23_renderer::render_scanline), this), 4, p->pv);
else if (p->vertex_count == 6)
render_polygon<6>(scissor, render_delegate(FUNC(namcos23_renderer::render_scanline), this), 4, p->pv);
}
render.poly_count = 0;