Differential D9415 Diff 44661 source/blender/gpu/intern/gpu_immediate_util.c

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source/blender/gpu/intern/gpu_immediate_util.c

Show First 20 Lines • Show All 596 Lines • ▼ Show 20 Lines	for (int j = 0; j < stacks; j++) {
/* second tri */		/* second tri */
immVertex3fv(pos, v3);		immVertex3fv(pos, v3);
immVertex3fv(pos, v4);		immVertex3fv(pos, v4);
immVertex3fv(pos, v1);		immVertex3fv(pos, v1);
}		}
}		}
immEnd();		immEnd();
}		}

		/* OpenGL Circle Drawing - Tables for Optimized Drawing Speed */
		/* 32 values of sin function (still same result!) */
		#define CIRCLE_RESOL 32

		static const float sinval[CIRCLE_RESOL] = {
		0.00000000, 0.20129852, 0.39435585, 0.57126821, 0.72479278, 0.84864425, 0.93775213,
		0.98846832, 0.99871650, 0.96807711, 0.89780453, 0.79077573, 0.65137248, 0.48530196,
		0.29936312, 0.10116832, -0.10116832, -0.29936312, -0.48530196, -0.65137248, -0.79077573,
		-0.89780453, -0.96807711, -0.99871650, -0.98846832, -0.93775213, -0.84864425, -0.72479278,
		-0.57126821, -0.39435585, -0.20129852, 0.00000000,
		};

		/* 32 values of cos function (still same result!) */
		static const float cosval[CIRCLE_RESOL] = {
		1.00000000, 0.97952994, 0.91895781, 0.82076344, 0.68896691, 0.52896401, 0.34730525,
		0.15142777, -0.05064916, -0.25065253, -0.44039415, -0.61210598, -0.75875812, -0.87434661,
		-0.95413925, -0.99486932, -0.99486932, -0.95413925, -0.87434661, -0.75875812, -0.61210598,
		-0.44039415, -0.25065253, -0.05064916, 0.15142777, 0.34730525, 0.52896401, 0.68896691,
		0.82076344, 0.91895781, 0.97952994, 1.00000000,
		};

		static void circball_array_fill(const float verts[CIRCLE_RESOL][3],
		const float cent[3],
		float rad,
		const float tmat[4][4])
		{
		float vx[3], vy[3];
		float viter = (float )verts;

		mul_v3_v3fl(vx, tmat[0], rad);
		mul_v3_v3fl(vy, tmat[1], rad);

		for (uint a = 0; a < CIRCLE_RESOL; a++, viter += 3) {
		viter[0] = cent[0] + sinval[a] * vx[0] + cosval[a] * vy[0];
		viter[1] = cent[1] + sinval[a] * vx[1] + cosval[a] * vy[1];
		viter[2] = cent[2] + sinval[a] * vx[2] + cosval[a] * vy[2];
		}
		}

		void imm_drawcircball(const float cent[3], float rad, const float tmat[4][4], uint pos)
		{
		float verts[CIRCLE_RESOL][3];

		circball_array_fill(verts, cent, rad, tmat);

		immBegin(GPU_PRIM_LINE_LOOP, CIRCLE_RESOL);
		for (int i = 0; i < CIRCLE_RESOL; i++) {
		immVertex3fv(pos, verts[i]);
		}
		immEnd();
		}

		void imm_drawX(const float cent[3], float size, const float tmat[4][4], uint pos)
		{
		/* Draw an "X" indicating where the previous snap point is.
		* This is useful for indicating perpendicular snap. */

		/* v1, v2, v3 and v4 indicate the coordinates of the ends of the "X". */
		float vx[3], vy[3], v1[3], v2[3], v3[3], v4[4];

		mul_v3_v3fl(vx, tmat[0], size);
		mul_v3_v3fl(vy, tmat[1], size);

		add_v3_v3v3(v1, vx, vy);
		sub_v3_v3v3(v2, vx, vy);
		negate_v3_v3(v3, v1);
		negate_v3_v3(v4, v2);

		add_v3_v3(v1, cent);
		add_v3_v3(v2, cent);
		add_v3_v3(v3, cent);
		add_v3_v3(v4, cent);

		immBegin(GPU_PRIM_LINES, 4);
		immVertex3fv(pos, v3);
		immVertex3fv(pos, v1);
		immVertex3fv(pos, v4);
		immVertex3fv(pos, v2);
		immEnd();
		}
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