height_field_tessellator::height_field_tessellator(const gl::render_device_ptr& device)
: _pixel_tolerance(4.0f)
{
using namespace scm;
using namespace scm::gl;
using namespace scm::math;
using boost::assign::list_of;
// state objects //////////////////////////////////////////////////////////////////////////////
_bstate_no_blend = device->create_blend_state(false, FUNC_ONE, FUNC_ZERO, FUNC_ONE, FUNC_ZERO);
_bstate_omsa = device->create_blend_state(true, FUNC_SRC_ALPHA, FUNC_ONE_MINUS_SRC_ALPHA, FUNC_ONE, FUNC_ZERO);
_dstate_less = device->create_depth_stencil_state(true, true, COMPARISON_LESS);
_rstate_ms_wire = device->create_rasterizer_state(FILL_WIREFRAME, CULL_NONE, ORIENT_CCW, true);
_rstate_ms_solid = device->create_rasterizer_state(FILL_SOLID, CULL_NONE, ORIENT_CCW, true);
_rstate_ms_solid_ss = device->create_rasterizer_state(FILL_SOLID, CULL_NONE, ORIENT_CCW, true, true, 1.0f);
//_rstate_ms_wire = device->create_rasterizer_state(FILL_WIREFRAME, CULL_BACK, ORIENT_CCW, true);
//_rstate_ms_solid = device->create_rasterizer_state(FILL_SOLID, CULL_BACK, ORIENT_CCW, true);
_sstate_nearest = device->create_sampler_state(FILTER_MIN_MAG_NEAREST, WRAP_CLAMP_TO_EDGE);
_sstate_linear = device->create_sampler_state(FILTER_MIN_MAG_LINEAR, WRAP_CLAMP_TO_EDGE);
_sstate_linear_mip = device->create_sampler_state(FILTER_MIN_MAG_MIP_LINEAR, WRAP_CLAMP_TO_EDGE);
if ( !_bstate_no_blend
|| !_bstate_omsa
|| !_dstate_less
|| !_rstate_ms_wire
|| !_rstate_ms_solid
|| !_sstate_nearest
|| !_sstate_linear
|| !_sstate_linear_mip) {
throw (std::runtime_error("height_field_tessellator::height_field_tessellator(): error creating state objects"));
}
gl::camera_uniform_block::add_block_include_string(device);
device->add_include_files("./../../../src/renderers/shaders", "/scm/data");
// ray casting program ////////////////////////////////////////////////////////////////////////
_hf_quad_tessellation_program = device->create_program(
list_of(device->create_shader_from_file(STAGE_VERTEX_SHADER, "../../../src/renderers/shaders/height_field/tessellate.glslv"))
(device->create_shader_from_file(STAGE_TESS_CONTROL_SHADER, "../../../src/renderers/shaders/height_field/tessellate_quad.glsltc"))
(device->create_shader_from_file(STAGE_TESS_EVALUATION_SHADER, "../../../src/renderers/shaders/height_field/tessellate_quad.glslte"))
(device->create_shader_from_file(STAGE_GEOMETRY_SHADER, "../../../src/renderers/shaders/height_field/tessellate.glslg"))
(device->create_shader_from_file(STAGE_FRAGMENT_SHADER, "../../../src/renderers/shaders/height_field/tessellate.glslf")),
"height_field_tessellator::hf_quad_tessellation_program");
_hf_triangle_tessellation_program = device->create_program(
list_of(device->create_shader_from_file(STAGE_VERTEX_SHADER, "../../../src/renderers/shaders/height_field/tessellate.glslv"))
(device->create_shader_from_file(STAGE_TESS_CONTROL_SHADER, "../../../src/renderers/shaders/height_field/tessellate_tri.glsltc", shader_macro("PRIMITIVE_ID_REPRO", "0")))
(device->create_shader_from_file(STAGE_TESS_EVALUATION_SHADER, "../../../src/renderers/shaders/height_field/tessellate_tri.glslte"))
(device->create_shader_from_file(STAGE_GEOMETRY_SHADER, "../../../src/renderers/shaders/height_field/tessellate.glslg"))
(device->create_shader_from_file(STAGE_FRAGMENT_SHADER, "../../../src/renderers/shaders/height_field/tessellate.glslf")),
//separate_stream_capture("per_vertex.vertex.ws_position"),
//interleaved_stream_capture("per_vertex.vertex.ws_position")("per_vertex.vertex.texcoord_hm"),
//interleaved_stream_capture("per_vertex.vertex.ws_position")("per_vertex.vertex.texcoord_hm")(stream_capture::skip_4_float), // GL4+ only
//stream_capture_array("per_vertex.vertex.ws_position")
//stream_capture_array("per_vertex.vertex.ws_position")("per_vertex.vertex.texcoord_hm")("per_vertex.vertex.texcoord_dm"),
//stream_capture_array(interleaved_stream_capture("per_vertex.vertex.ws_position")("per_vertex.vertex.texcoord_hm"))
// (separate_stream_capture("per_vertex.vertex.texcoord_dm")),
//stream_capture_array(interleaved_stream_capture("per_vertex.vertex.ws_position")("per_vertex.vertex.texcoord_hm")(stream_capture::skip_4_float))
// (separate_stream_capture("per_vertex.vertex.texcoord_dm")),
"height_field_tessellator::hf_triangle_tessellation_program");
if ( !_hf_quad_tessellation_program
|| !_hf_triangle_tessellation_program) {
throw (std::runtime_error("height_field_ray_caster::height_field_ray_caster(): error creating quad or triangle program"));
}
// set default uniforms
_hf_quad_tessellation_program->uniform_buffer("camera_matrices", 0);
_hf_quad_tessellation_program->uniform_sampler("height_map", 0);
_hf_quad_tessellation_program->uniform_sampler("height_map_nearest", 1);
_hf_quad_tessellation_program->uniform_sampler("density_map", 2);
_hf_quad_tessellation_program->uniform_sampler("color_map", 3);
// set default uniforms
_hf_triangle_tessellation_program->uniform_buffer("camera_matrices", 0);
_hf_triangle_tessellation_program->uniform_sampler("height_map", 0);
_hf_triangle_tessellation_program->uniform_sampler("height_map_nearest", 1);
_hf_triangle_tessellation_program->uniform_sampler("density_map", 2);
_hf_triangle_tessellation_program->uniform_sampler("color_map", 3);
_hf_triangle_tessellation_program->uniform_sampler("edge_densities", 4);
_main_camera_block.reset(new gl::camera_uniform_block(device));
}
