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Disable automatic culling #468

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slmjkdbtl merged 2 commits into from
Dec 16, 2021
Merged

Disable automatic culling #468

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c6e592c
disable culling
slmjkdbtl Dec 16, 2021
d557b47
remove unused code
slmjkdbtl Dec 16, 2021
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19 changes: 1 addition & 18 deletions src/gfx.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,6 @@ import {
isVec3,
isColor,
isMat4,
testRectRect,
} from "./math";

import {
Expand Down Expand Up @@ -480,20 +479,11 @@ function gfxInit(gl: WebGLRenderingContext, gopt: GfxOpt): Gfx {
flush();
}

const objBound = { p1: vec2(Number.MAX_VALUE), p2: vec2(-Number.MAX_VALUE)};
const screenBound = { p1: vec2(-1), p2: vec2(1) };

for (const v of verts) {

// WebGL screen space coordinate [-1.0 ~ 1.0]
// normalized world space coordinate [-1.0 ~ 1.0]
const pt = toNDC(gfx.transform.multVec2(v.pos.xy()));

// get the bounding rectangle for the polygon
objBound.p1.x = Math.min(objBound.p1.x, pt.x);
objBound.p2.x = Math.max(objBound.p2.x, pt.x);
objBound.p1.y = Math.min(objBound.p1.y, pt.y);
objBound.p2.y = Math.max(objBound.p2.y, pt.y);

gfx.vqueue.push(
pt.x, pt.y, v.pos.z,
v.uv.x, v.uv.y,
Expand All @@ -502,13 +492,6 @@ function gfxInit(gl: WebGLRenderingContext, gopt: GfxOpt): Gfx {

}

// if the object bound is totally outside, we don't render
if (!testRectRect(objBound, screenBound)) {
const num = verts.length * STRIDE;
gfx.vqueue.splice(gfx.vqueue.length - num, num);
return;
}

for (const i of indices) {
gfx.iqueue.push(i + gfx.vqueue.length / STRIDE - verts.length);
}
Expand Down