Differential D15817 Diff 55261 source/blender/draw/intern/shaders/common_intersect_lib.glsl

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source/blender/draw/intern/shaders/common_intersect_lib.glsl

Show First 20 Lines • Show All 64 Lines • ▼ Show 20 Lines	IsectBox isect_data_setup(Box shape)
data.planes[4] = vec4(-data.planes[1].xyz, -dot(-data.planes[1].xyz, shape.corners[6]));		data.planes[4] = vec4(-data.planes[1].xyz, -dot(-data.planes[1].xyz, shape.corners[6]));
data.planes[5] = vec4(-data.planes[2].xyz, -dot(-data.planes[2].xyz, shape.corners[6]));		data.planes[5] = vec4(-data.planes[2].xyz, -dot(-data.planes[2].xyz, shape.corners[6]));
for (int i = 0; i < 8; i++) {		for (int i = 0; i < 8; i++) {
data.corners[i] = shape.corners[i];		data.corners[i] = shape.corners[i];
}		}
return data;		return data;
}		}

		/* Construct box from 1 corner point + 3 side vectors. */
		IsectBox isect_data_setup(vec3 origin, vec3 side_x, vec3 side_y, vec3 side_z)
		{
		IsectBox data;
		data.corners[0] = origin;
		data.corners[1] = origin + side_x;
		data.corners[2] = origin + side_y + side_x;
		data.corners[3] = origin + side_y;
		data.corners[4] = data.corners[0] + side_z;
		data.corners[5] = data.corners[1] + side_z;
		data.corners[6] = data.corners[2] + side_z;
		data.corners[7] = data.corners[3] + side_z;

		data.planes[0] = isect_plane_setup(data.corners[0], side_y, side_z);
		data.planes[1] = isect_plane_setup(data.corners[0], side_x, side_y);
		data.planes[2] = isect_plane_setup(data.corners[0], side_z, side_x);
		/* Assumes that the box is actually a box! */
		data.planes[3] = vec4(-data.planes[0].xyz, -dot(-data.planes[0].xyz, data.corners[6]));
		data.planes[4] = vec4(-data.planes[1].xyz, -dot(-data.planes[1].xyz, data.corners[6]));
		data.planes[5] = vec4(-data.planes[2].xyz, -dot(-data.planes[2].xyz, data.corners[6]));

		return data;
		}

struct IsectFrustum {		struct IsectFrustum {
vec3 corners[8];		vec3 corners[8];
vec4 planes[6];		vec4 planes[6];
};		};

IsectFrustum isect_data_setup(Frustum shape)		IsectFrustum isect_data_setup(Frustum shape)
{		{
vec3 A1 = shape.corners[1] - shape.corners[0];		vec3 A1 = shape.corners[1] - shape.corners[0];
▲ Show 20 Lines • Show All 108 Lines • ▼ Show 20 Lines	if (all_vertex_on_negative_side) {
intersects = false;		intersects = false;
break;		break;
}		}
}		}

return intersects;		return intersects;
}		}

		bool intersect_view(IsectBox i_box)
		{
		bool intersects = true;

		/* Do Box vertices vs Frustum planes. */
		for (int p = 0; p < 6; ++p) {
		bool is_any_vertex_on_positive_side = false;
		for (int v = 0; v < 8; ++v) {
		float test = dot(drw_view.frustum_planes[p], vec4(i_box.corners[v], 1.0));
		if (test > 0.0) {
		is_any_vertex_on_positive_side = true;
		break;
		}
		}
		bool all_vertex_on_negative_side = !is_any_vertex_on_positive_side;
		if (all_vertex_on_negative_side) {
		intersects = false;
		break;
		}
		}

		if (!intersects) {
		return intersects;
		}

		for (int p = 0; p < 6; ++p) {
		bool is_any_vertex_on_positive_side = false;
		for (int v = 0; v < 8; ++v) {
		float test = dot(i_box.planes[p], vec4(drw_view.frustum_corners[v].xyz, 1.0));
		if (test > 0.0) {
		is_any_vertex_on_positive_side = true;
		break;
		}
		}
		bool all_vertex_on_negative_side = !is_any_vertex_on_positive_side;
		if (all_vertex_on_negative_side) {
		intersects = false;
		break;
		}
		}

		return intersects;
		}

bool intersect_view(Sphere sphere)		bool intersect_view(Sphere sphere)
{		{
bool intersects = true;		bool intersects = true;

for (int p = 0; p < 6 && intersects; ++p) {		for (int p = 0; p < 6 && intersects; ++p) {
float dist_to_plane = dot(drw_view.frustum_planes[p], vec4(sphere.center, 1.0));		float dist_to_plane = dot(drw_view.frustum_planes[p], vec4(sphere.center, 1.0));
if (dist_to_plane < -sphere.radius) {		if (dist_to_plane < -sphere.radius) {
intersects = false;		intersects = false;
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